210121010120 has 48 divisors (see below), whose sum is σ = 549959587740. Its totient is φ = 72041488512.

The previous prime is 210121010111. The next prime is 210121010147. The reversal of 210121010120 is 21010121012.

It can be written as a sum of positive squares in 2 ways, for example, as 209978398756 + 142611364 = 458234^2 + 11942^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53600339 + ... + 53604258.

Almost surely, 2^210121010120 is an apocalyptic number.

210121010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121010120 is an abundant number, since it is smaller than the sum of its proper divisors (339838577620).

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

210121010120 is a wasteful number, since it uses less digits than its factorization.

210121010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107204622 (or 107204611 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210121010120 its reverse (21010121012), we get a palindrome (231131131132).

The spelling of 210121010120 in words is "two hundred ten billion, one hundred twenty-one million, ten thousand, one hundred twenty".