121021102120 has 64 divisors (see below), whose sum is σ = 297615513600. Its totient is φ = 44091171840.

The previous prime is 121021102099. The next prime is 121021102177. The reversal of 121021102120 is 21201120121.

It is a super-2 number, since 2×121021102120² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121021102120.

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, 2849440 + ... + 2891599.

It is an arithmetic number, because the mean of its divisors is an integer number (4650242400).

Almost surely, 2^121021102120 is an apocalyptic number.

121021102120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021102120 is an abundant number, since it is smaller than the sum of its proper divisors (176594411480).

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

121021102120 is a wasteful number, since it uses less digits than its factorization.

121021102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741098 (or 5741094 counting only the distinct ones).

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

Adding to 121021102120 its reverse (21201120121), we get a palindrome (142222222241).

The spelling of 121021102120 in words is "one hundred twenty-one billion, twenty-one million, one hundred two thousand, one hundred twenty".