21011130031131 has 60 divisors (see below), whose sum is σ = 32489008818552. Its totient is φ = 13531799088000.

The previous prime is 21011130031051. The next prime is 21011130031153. The reversal of 21011130031131 is 13113003111012.

21011130031131 is a `hidden beast` number, since 2 + 10 + 1 + 11 + 300 + 311 + 31 = 666.

It is not a de Polignac number, because 21011130031131 - 2¹⁵ = 21011129998363 is a prime.

It is a super-2 number, since 2×21011130031131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011130036131) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 44210851 + ... + 44683571.

Almost surely, 2^{21011130031131} is an apocalyptic number.

21011130031131 is a deficient number, since it is larger than the sum of its proper divisors (11477878787421).

21011130031131 is an equidigital number, since it uses as much as digits as its factorization.

21011130031131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473366 (or 473326 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 21011130031131 its reverse (13113003111012), we get a palindrome (34124133142143).

The spelling of 21011130031131 in words is "twenty-one trillion, eleven billion, one hundred thirty million, thirty-one thousand, one hundred thirty-one".