121002112120 has 32 divisors (see below), whose sum is σ = 272266459920. Its totient is φ = 48398763520.

The previous prime is 121002112097. The next prime is 121002112129. The reversal of 121002112120 is 21211200121.

It is a super-2 number, since 2×121002112120² (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 121002112120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002112129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163040 + ... + 1262800.

Almost surely, 2^121002112120 is an apocalyptic number.

121002112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002112120 is an abundant number, since it is smaller than the sum of its proper divisors (151264347800).

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

121002112120 is a wasteful number, since it uses less digits than its factorization.

121002112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130095 (or 130091 counting only the distinct ones).

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

Adding to 121002112120 its reverse (21211200121), we get a palindrome (142213312241).

The spelling of 121002112120 in words is "one hundred twenty-one billion, two million, one hundred twelve thousand, one hundred twenty".