121002210120 has 64 divisors (see below), whose sum is σ = 396007237440. Its totient is φ = 29333868800.

The previous prime is 121002210089. The next prime is 121002210167. The reversal of 121002210120 is 21012200121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121002210096 and 121002210105.

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, 45832851 + ... + 45835490.

It is an arithmetic number, because the mean of its divisors is an integer number (6187613085).

Almost surely, 2^121002210120 is an apocalyptic number.

121002210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002210120 is an abundant number, since it is smaller than the sum of its proper divisors (275005027320).

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

121002210120 is a wasteful number, since it uses less digits than its factorization.

121002210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91668366 (or 91668362 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121002210120 its reverse (21012200121), we get a palindrome (142014410241).

Subtracting from 121002210120 its reverse (21012200121), we obtain a palindrome (99990009999).

The spelling of 121002210120 in words is "one hundred twenty-one billion, two million, two hundred ten thousand, one hundred twenty".