21031202233231 has 32 divisors (see below), whose sum is σ = 22284197784576. Its totient is φ = 19807196640000.

The previous prime is 21031202233201. The next prime is 21031202233241. The reversal of 21031202233231 is 13233220213012.

It is a cyclic number.

It is not a de Polignac number, because 21031202233231 - 2²⁹ = 21030665362319 is a prime.

It is a super-2 number, since 2×21031202233231² (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 = 21031202233196 and 21031202233205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031202233201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6371159281 + ... + 6371162581.

It is an arithmetic number, because the mean of its divisors is an integer number (696381180768).

Almost surely, 2^{21031202233231} is an apocalyptic number.

21031202233231 is a deficient number, since it is larger than the sum of its proper divisors (1252995551345).

21031202233231 is a wasteful number, since it uses less digits than its factorization.

21031202233231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7383.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21031202233231 its reverse (13233220213012), we get a palindrome (34264422446243).

The spelling of 21031202233231 in words is "twenty-one trillion, thirty-one billion, two hundred two million, two hundred thirty-three thousand, two hundred thirty-one".