21131323122330 has 48 divisors (see below), whose sum is σ = 54970773946920. Its totient is φ = 5632010901504.

The previous prime is 21131323122317. The next prime is 21131323122389. The reversal of 21131323122330 is 3322132313112.

21131323122330 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 1 + 323 + 1 + 2 + 2 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5751694196361 + 15379628925969 = 2398269^2 + 3921687^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21131323122294 and 21131323122303.

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, 62509615 + ... + 62846754.

Almost surely, 2^{21131323122330} is an apocalyptic number.

21131323122330 is an abundant number, since it is smaller than the sum of its proper divisors (33839450824590).

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

21131323122330 is a wasteful number, since it uses less digits than its factorization.

21131323122330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125358255 (or 125358252 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21131323122330 its reverse (3322132313112), we get a palindrome (24453455435442).

The spelling of 21131323122330 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred twenty-three million, one hundred twenty-two thousand, three hundred thirty".