21130121231032 has 64 divisors (see below), whose sum is σ = 43515155664000. Its totient is φ = 9539179520640.

The previous prime is 21130121231017. The next prime is 21130121231057. The reversal of 21130121231032 is 23013212103112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21130121230994 and 21130121231012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139265403 + ... + 139417045.

It is an arithmetic number, because the mean of its divisors is an integer number (679924307250).

Almost surely, 2^{21130121231032} is an apocalyptic number.

21130121231032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21130121231032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21757577832000).

21130121231032 is an abundant number, since it is smaller than the sum of its proper divisors (22385034432968).

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

21130121231032 is a wasteful number, since it uses less digits than its factorization.

21130121231032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162436 (or 162432 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21130121231032 its reverse (23013212103112), we get a palindrome (44143333334144).

The spelling of 21130121231032 in words is "twenty-one trillion, one hundred thirty billion, one hundred twenty-one million, two hundred thirty-one thousand, thirty-two".