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120121011220 = 22572773097499
BaseRepresentation
bin110111111011111000…
…1010010110000010100
3102111001102212121200111
41233313301102300110
53432001434324340
6131103254052404
711451465514540
oct1576761226024
9374042777614
10120121011220
1146a411a76a1
121b34434a104
13b4342a6642
145b57446a20
1531d090aaea
hex1bf7c52c14

120121011220 has 48 divisors (see below), whose sum is σ = 289331280000. Its totient is φ = 41035653504.

The previous prime is 120121011181. The next prime is 120121011221. The reversal of 120121011220 is 22110121021.

It is a self number, because there is not a number n which added to its sum of digits gives 120121011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121011221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1509970 + ... + 1587529.

It is an arithmetic number, because the mean of its divisors is an integer number (6027735000).

Almost surely, 2120121011220 is an apocalyptic number.

120121011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120121011220 is an abundant number, since it is smaller than the sum of its proper divisors (169210268780).

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

120121011220 is a wasteful number, since it uses less digits than its factorization.

120121011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097792 (or 3097790 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 120121011220 its reverse (22110121021), we get a palindrome (142231132241).

The spelling of 120121011220 in words is "one hundred twenty billion, one hundred twenty-one million, eleven thousand, two hundred twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 277 554 1108 1385 1939 2770 3878 5540 7756 9695 19390 38780 3097499 6194998 12389996 15487495 21682493 30974990 43364986 61949980 86729972 108412465 216824930 433649860 858007223 1716014446 3432028892 4290036115 6006050561 8580072230 12012101122 17160144460 24024202244 30030252805 60060505610 120121011220