21131110033100 has 36 divisors (see below), whose sum is σ = 46119563773584. Its totient is φ = 8403585948480.

The previous prime is 21131110033093. The next prime is 21131110033127. The reversal of 21131110033100 is 133001113112.

It is a super-2 number, since 2×21131110033100² (a number of 27 digits) contains 22 as substring.

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, 610708424 + ... + 610743023.

Almost surely, 2^{21131110033100} is an apocalyptic number.

21131110033100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21131110033100 is an abundant number, since it is smaller than the sum of its proper divisors (24988453740484).

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

21131110033100 is a wasteful number, since it uses less digits than its factorization.

21131110033100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221451634 (or 1221451627 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21131110033100 its reverse (133001113112), we get a palindrome (21264111146212).

The spelling of 21131110033100 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred ten million, thirty-three thousand, one hundred".