21100211223200 has 72 divisors (see below), whose sum is σ = 54221990195520. Its totient is φ = 7995869510400.

The previous prime is 21100211223199. The next prime is 21100211223227. The reversal of 21100211223200 is 232211200112.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 694070696 + ... + 694101095.

It is an arithmetic number, because the mean of its divisors is an integer number (753083197160).

Almost surely, 2^{21100211223200} is an apocalyptic number.

21100211223200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100211223200 is an abundant number, since it is smaller than the sum of its proper divisors (33121778972320).

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

21100211223200 is a wasteful number, since it uses less digits than its factorization.

21100211223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388171830 (or 1388171817 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21100211223200 its reverse (232211200112), we get a palindrome (21332422423312).

The spelling of 21100211223200 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, two hundred twenty-three thousand, two hundred".