210100012100020 has 72 divisors (see below), whose sum is σ = 513352173761280. Its totient is φ = 72019151830080.

The previous prime is 210100012100003. The next prime is 210100012100089. The reversal of 210100012100020 is 20001210001012.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 17860636 + ... + 27188275.

It is an arithmetic number, because the mean of its divisors is an integer number (7129891302240).

Almost surely, 2^{210100012100020} is an apocalyptic number.

210100012100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210100012100020 is an abundant number, since it is smaller than the sum of its proper divisors (303252161661260).

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

210100012100020 is a wasteful number, since it uses less digits than its factorization.

210100012100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45053693 (or 45053684 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210100012100020 its reverse (20001210001012), we get a palindrome (230101222101032).

The spelling of 210100012100020 in words is "two hundred ten trillion, one hundred billion, twelve million, one hundred thousand, twenty".