121002010120 has 16 divisors (see below), whose sum is σ = 272254522860. Its totient is φ = 48400804032.

The previous prime is 121002010111. The next prime is 121002010187. The reversal of 121002010120 is 21010200121.

It can be written as a sum of positive squares in 2 ways, for example, as 119233471204 + 1768538916 = 345302^2 + 42054^2 .

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 = 121002010097 and 121002010106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512525087 + ... + 1512525166.

Almost surely, 2^121002010120 is an apocalyptic number.

121002010120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002010120 is an abundant number, since it is smaller than the sum of its proper divisors (151252512740).

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

121002010120 is a wasteful number, since it uses less digits than its factorization.

121002010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025050264 (or 3025050260 counting only the distinct ones).

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

Adding to 121002010120 its reverse (21010200121), we get a palindrome (142012210241).

The spelling of 121002010120 in words is "one hundred twenty-one billion, two million, ten thousand, one hundred twenty".