21331300131100 has 72 divisors (see below), whose sum is σ = 48726287568000. Its totient is φ = 8083256356800.

The previous prime is 21331300131077. The next prime is 21331300131121. The reversal of 21331300131100 is 113100313312.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent 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, 107309601 + ... + 107508199.

It is an arithmetic number, because the mean of its divisors is an integer number (676753994000).

Almost surely, 2^{21331300131100} is an apocalyptic number.

21331300131100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21331300131100 is an abundant number, since it is smaller than the sum of its proper divisors (27394987436900).

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

21331300131100 is a wasteful number, since it uses less digits than its factorization.

21331300131100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255163 (or 255156 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21331300131100 its reverse (113100313312), we get a palindrome (21444400444412).

The spelling of 21331300131100 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred million, one hundred thirty-one thousand, one hundred".