21200110032100 has 72 divisors (see below), whose sum is σ = 47318013918560. Its totient is φ = 8239917127680.

The previous prime is 21200110032077. The next prime is 21200110032121. The reversal of 21200110032100 is 123001100212.

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, 11942790 + ... + 13602589.

Almost surely, 2^{21200110032100} is an apocalyptic number.

21200110032100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200110032100 is an abundant number, since it is smaller than the sum of its proper divisors (26117903886460).

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

21200110032100 is a wasteful number, since it uses less digits than its factorization.

21200110032100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25545629 (or 25545622 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21200110032100 its reverse (123001100212), we get a palindrome (21323111132312).

The spelling of 21200110032100 in words is "twenty-one trillion, two hundred billion, one hundred ten million, thirty-two thousand, one hundred".