202111210120 has 32 divisors (see below), whose sum is σ = 457262671320. Its totient is φ = 80397826560.

The previous prime is 202111210099. The next prime is 202111210139. The reversal of 202111210120 is 21012111202.

It can be written as a sum of positive squares in 4 ways, for example, as 116593565764 + 85517644356 = 341458^2 + 292434^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202111210120.

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, 13950717 + ... + 13965196.

Almost surely, 2^202111210120 is an apocalyptic number.

202111210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202111210120 is an abundant number, since it is smaller than the sum of its proper divisors (255151461200).

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

202111210120 is a wasteful number, since it uses less digits than its factorization.

202111210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27916105 (or 27916101 counting only the distinct ones).

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

Adding to 202111210120 its reverse (21012111202), we get a palindrome (223123321322).

The spelling of 202111210120 in words is "two hundred two billion, one hundred eleven million, two hundred ten thousand, one hundred twenty".