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1002111220 = 225114555051
BaseRepresentation
bin111011101110110…
…000000011110100
32120211122112011101
4323232300003310
54023020024340
6243234415444
733555543025
oct7356600364
92524575141
101002111220
11474735aa0
1223b731584
1312c7c9126
149713ac4c
155ce9bc9a
hex3bbb00f4

1002111220 has 24 divisors (see below), whose sum is σ = 2295746208. Its totient is φ = 364404000.

The previous prime is 1002111203. The next prime is 1002111277. The reversal of 1002111220 is 221112001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1002111197 and 1002111206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2277306 + ... + 2277745.

It is an arithmetic number, because the mean of its divisors is an integer number (95656092).

Almost surely, 21002111220 is an apocalyptic number.

1002111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002111220 is an abundant number, since it is smaller than the sum of its proper divisors (1293634988).

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

1002111220 is a wasteful number, since it uses less digits than its factorization.

1002111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555071 (or 4555069 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1002111220 is about 31656.1403206392. The cubic root of 1002111220 is about 1000.7032453301.

Adding to 1002111220 its reverse (221112001), we get a palindrome (1223223221).

The spelling of 1002111220 in words is "one billion, two million, one hundred eleven thousand, two hundred twenty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 4555051 9110102 18220204 22775255 45550510 50105561 91101020 100211122 200422244 250527805 501055610 1002111220