210202102120 has 32 divisors (see below), whose sum is σ = 473003598600. Its totient is φ = 84072153088.

The previous prime is 210202102109. The next prime is 210202102151. The reversal of 210202102120 is 21201202012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 186625728004 + 23576374116 = 432002^2 + 153546^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210202102120.

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, 127716 + ... + 660844.

Almost surely, 2^210202102120 is an apocalyptic number.

210202102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210202102120 is an abundant number, since it is smaller than the sum of its proper divisors (262801496480).

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

210202102120 is a wasteful number, since it uses less digits than its factorization.

210202102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542997 (or 542993 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210202102120 its reverse (21201202012), we get a palindrome (231403304132).

The spelling of 210202102120 in words is "two hundred ten billion, two hundred two million, one hundred two thousand, one hundred twenty".