210120211022100 has 72 divisors (see below), whose sum is σ = 607953922625280. Its totient is φ = 56031492948480.

The previous prime is 210120211022089. The next prime is 210120211022119. The reversal of 210120211022100 is 1220112021012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 210120211022100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26803581 + ... + 33744219.

Almost surely, 2^{210120211022100} is an apocalyptic number.

210120211022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210120211022100 is an abundant number, since it is smaller than the sum of its proper divisors (397833711603180).

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

210120211022100 is a wasteful number, since it uses less digits than its factorization.

210120211022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7041569 (or 7041562 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210120211022100 its reverse (1220112021012), we get a palindrome (211340323043112).

The spelling of 210120211022100 in words is "two hundred ten trillion, one hundred twenty billion, two hundred eleven million, twenty-two thousand, one hundred".