221024031231 has 16 divisors (see below), whose sum is σ = 312066720000. Its totient is φ = 138758226048.

The previous prime is 221024031211. The next prime is 221024031257. The reversal of 221024031231 is 132130420122.

It is not a de Polignac number, because 221024031231 - 2⁵ = 221024031199 is a prime.

It is a super-2 number, since 2×221024031231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221024031198 and 221024031207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221024031211) 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 15 ways as a sum of consecutive naturals, for example, 11600106 + ... + 11619143.

It is an arithmetic number, because the mean of its divisors is an integer number (19504170000).

Almost surely, 2^221024031231 is an apocalyptic number.

221024031231 is a deficient number, since it is larger than the sum of its proper divisors (91042688769).

221024031231 is a wasteful number, since it uses less digits than its factorization.

221024031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23219438.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221024031231 its reverse (132130420122), we get a palindrome (353154451353).

The spelling of 221024031231 in words is "two hundred twenty-one billion, twenty-four million, thirty-one thousand, two hundred thirty-one".