21130113132 has 36 divisors (see below), whose sum is σ = 53423370000. Its totient is φ = 7041902112.

The previous prime is 21130113131. The next prime is 21130113163. The reversal of 21130113132 is 23131103112.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21130113132² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21130113131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121258 + ... + 238670.

It is an arithmetic number, because the mean of its divisors is an integer number (1483982500).

Almost surely, 2^21130113132 is an apocalyptic number.

It is an amenable number.

21130113132 is an abundant number, since it is smaller than the sum of its proper divisors (32293256868).

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

21130113132 is a wasteful number, since it uses less digits than its factorization.

21130113132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122422 (or 122417 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21130113132 its reverse (23131103112), we get a palindrome (44261216244).

The spelling of 21130113132 in words is "twenty-one billion, one hundred thirty million, one hundred thirteen thousand, one hundred thirty-two".