21131324124100 has 36 divisors (see below), whose sum is σ = 48268393003600. Its totient is φ = 8007659667360.

The previous prime is 21131324124089. The next prime is 21131324124269. The reversal of 21131324124100 is 142142313112.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 5560872870 + ... + 5560876669.

Almost surely, 2^{21131324124100} is an apocalyptic number.

21131324124100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21131324124100 is an abundant number, since it is smaller than the sum of its proper divisors (27137068879500).

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

21131324124100 is a wasteful number, since it uses less digits than its factorization.

21131324124100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121749572 (or 11121749565 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21131324124100 its reverse (142142313112), we get a palindrome (21273466437212).

The spelling of 21131324124100 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred twenty-four million, one hundred twenty-four thousand, one hundred".