221424204001231 has 32 divisors (see below), whose sum is σ = 307684471518720. Its totient is φ = 153842235724800.

The previous prime is 221424204001207. The next prime is 221424204001267. The reversal of 221424204001231 is 132100402424122.

It is not a de Polignac number, because 221424204001231 - 2⁷ = 221424204001103 is a prime.

It is a super-2 number, since 2×221424204001231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221424204001231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221424204001201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4451428710 + ... + 4451478451.

It is an arithmetic number, because the mean of its divisors is an integer number (9615139734960).

Almost surely, 2^{221424204001231} is an apocalyptic number.

221424204001231 is a deficient number, since it is larger than the sum of its proper divisors (86260267517489).

221424204001231 is a wasteful number, since it uses less digits than its factorization.

221424204001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8902907215.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 221424204001231 its reverse (132100402424122), we get a palindrome (353524606425353).

The spelling of 221424204001231 in words is "two hundred twenty-one trillion, four hundred twenty-four billion, two hundred four million, one thousand, two hundred thirty-one".