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221231100120 = 23357572435393
BaseRepresentation
bin1100111000001001100…
…1101011000011011000
3210011000222100022121220
43032002121223003120
512111040130200440
6245344314132040
721661212216042
oct3160231530330
9704028308556
10221231100120
1185907208a38
1236a61a21020
1317b28a89c04
14a9c9ab0a92
155b4c3208d0
hex338266b0d8

221231100120 has 64 divisors (see below), whose sum is σ = 664570314720. Its totient is φ = 58917003264.

The previous prime is 221231100089. The next prime is 221231100121. The reversal of 221231100120 is 21001132122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221231100120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221231100121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126857 + ... + 1308536.

Almost surely, 2221231100120 is an apocalyptic number.

221231100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221231100120 is an abundant number, since it is smaller than the sum of its proper divisors (443339214600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221231100120 is a wasteful number, since it uses less digits than its factorization.

221231100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436164 (or 2436160 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221231100120 its reverse (21001132122), we get a palindrome (242232232242).

The spelling of 221231100120 in words is "two hundred twenty-one billion, two hundred thirty-one million, one hundred thousand, one hundred twenty".

Divisors: 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 757 1514 2271 3028 3785 4542 6056 7570 9084 11355 15140 18168 22710 30280 45420 90840 2435393 4870786 7306179 9741572 12176965 14612358 19483144 24353930 29224716 36530895 48707860 58449432 73061790 97415720 146123580 292247160 1843592501 3687185002 5530777503 7374370004 9217962505 11061555006 14748740008 18435925010 22123110012 27653887515 36871850020 44246220024 55307775030 73743700040 110615550060 221231100120