121012442120 has 64 divisors (see below), whose sum is σ = 278685792000. Its totient is φ = 47266426368.

The previous prime is 121012442107. The next prime is 121012442153. The reversal of 121012442120 is 21244210121.

It is a super-2 number, since 2×121012442120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121012442092 and 121012442101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8539601 + ... + 8553759.

It is an arithmetic number, because the mean of its divisors is an integer number (4354465500).

Almost surely, 2^121012442120 is an apocalyptic number.

121012442120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012442120 is an abundant number, since it is smaller than the sum of its proper divisors (157673349880).

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

121012442120 is a wasteful number, since it uses less digits than its factorization.

121012442120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19182 (or 19178 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121012442120 its reverse (21244210121), we get a palindrome (142256652241).

The spelling of 121012442120 in words is "one hundred twenty-one billion, twelve million, four hundred forty-two thousand, one hundred twenty".