21116332125031 has 12 divisors (see below), whose sum is σ = 24944306267160. Its totient is φ = 17719998984480.

The previous prime is 21116332125001. The next prime is 21116332125173. The reversal of 21116332125031 is 13052123361112.

It is not a de Polignac number, because 21116332125031 - 2⁵ = 21116332124999 is a prime.

It is a super-2 number, since 2×21116332125031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21116332124984 and 21116332125002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116332125001) 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, 5679484996 + ... + 5679488713.

It is an arithmetic number, because the mean of its divisors is an integer number (2078692188930).

Almost surely, 2^{21116332125031} is an apocalyptic number.

21116332125031 is a deficient number, since it is larger than the sum of its proper divisors (3827974142129).

21116332125031 is a wasteful number, since it uses less digits than its factorization.

21116332125031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11358973746 (or 11358973733 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 21116332125031 its reverse (13052123361112), we get a palindrome (34168455486143).

The spelling of 21116332125031 in words is "twenty-one trillion, one hundred sixteen billion, three hundred thirty-two million, one hundred twenty-five thousand, thirty-one".