121021120 has 56 divisors (see below), whose sum is σ = 314389008. Its totient is φ = 44006400.

The previous prime is 121021111. The next prime is 121021151. The reversal of 121021120 is 21120121.

It is a super-2 number, since 2×121021120² = 29292222972108800, which contains 22 as substring.

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 = 121021097 and 121021106.

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, 13671 + ... + 20710.

Almost surely, 2^121021120 is an apocalyptic number.

121021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021120 is an abundant number, since it is smaller than the sum of its proper divisors (193367888).

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

121021120 is a wasteful number, since it uses less digits than its factorization.

121021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34409 (or 34399 counting only the distinct ones).

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

The square root of 121021120 is about 11000.9599581127. The cubic root of 121021120 is about 494.6375198868.

Adding to 121021120 its reverse (21120121), we get a palindrome (142141241).

Subtracting from 121021120 its reverse (21120121), we obtain a palindrome (99900999).

The spelling of 121021120 in words is "one hundred twenty-one million, twenty-one thousand, one hundred twenty".