210101122120 has 32 divisors (see below), whose sum is σ = 489028476600. Its totient is φ = 81142501888.

The previous prime is 210101122111. The next prime is 210101122157. The reversal of 210101122120 is 21221101012.

It can be written as a sum of positive squares in 4 ways, for example, as 142396041316 + 67705080804 = 377354^2 + 260202^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210101122120.

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, 90559669 + ... + 90561988.

Almost surely, 2^210101122120 is an apocalyptic number.

210101122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210101122120 is an abundant number, since it is smaller than the sum of its proper divisors (278927354480).

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

210101122120 is a wasteful number, since it uses less digits than its factorization.

210101122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181121697 (or 181121693 counting only the distinct ones).

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

Adding to 210101122120 its reverse (21221101012), we get a palindrome (231322223132).

The spelling of 210101122120 in words is "two hundred ten billion, one hundred one million, one hundred twenty-two thousand, one hundred twenty".