21031013233130 has 16 divisors (see below), whose sum is σ = 37861296811560. Its totient is φ = 8411189072832.

The previous prime is 21031013233091. The next prime is 21031013233157. The reversal of 21031013233130 is 3133231013012.

It can be written as a sum of positive squares in 4 ways, for example, as 19202370966601 + 1828642266529 = 4382051^2 + 1352273^2 .

It is a super-2 number, since 2×21031013233130² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21031013233096 and 21031013233105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151954925 + ... + 152093264.

Almost surely, 2^{21031013233130} is an apocalyptic number.

21031013233130 is a deficient number, since it is larger than the sum of its proper divisors (16830283578430).

21031013233130 is a wasteful number, since it uses less digits than its factorization.

21031013233130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304055113.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21031013233130 its reverse (3133231013012), we get a palindrome (24164244246142).

The spelling of 21031013233130 in words is "twenty-one trillion, thirty-one billion, thirteen million, two hundred thirty-three thousand, one hundred thirty".