21000023100200 has 96 divisors (see below), whose sum is σ = 49943977190400. Its totient is φ = 8209480688640.

The previous prime is 21000023100137. The next prime is 21000023100239. The reversal of 21000023100200 is 200132000012.

It is a happy 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, 4468145 + ... + 7871744.

It is an arithmetic number, because the mean of its divisors is an integer number (520249762400).

Almost surely, 2^{21000023100200} is an apocalyptic number.

21000023100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000023100200 is an abundant number, since it is smaller than the sum of its proper divisors (28943954090200).

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

21000023100200 is a wasteful number, since it uses less digits than its factorization.

21000023100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12340099 (or 12340090 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21000023100200 its reverse (200132000012), we get a palindrome (21200155100212).

The spelling of 21000023100200 in words is "twenty-one trillion, twenty-three million, one hundred thousand, two hundred".