221310322131 has 24 divisors (see below), whose sum is σ = 317823673104. Its totient is φ = 136507686400.

The previous prime is 221310322127. The next prime is 221310322153. The reversal of 221310322131 is 131223013122.

It is not a de Polignac number, because 221310322131 - 2² = 221310322127 is a prime.

It is a super-2 number, since 2×221310322131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221310322098 and 221310322107.

It is not an unprimeable number, because it can be changed into a prime (221310322231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 445770 + ... + 800831.

It is an arithmetic number, because the mean of its divisors is an integer number (13242653046).

Almost surely, 2^221310322131 is an apocalyptic number.

221310322131 is a deficient number, since it is larger than the sum of its proper divisors (96513350973).

221310322131 is a wasteful number, since it uses less digits than its factorization.

221310322131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246739 (or 1246680 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221310322131 its reverse (131223013122), we get a palindrome (352533335253).

The spelling of 221310322131 in words is "two hundred twenty-one billion, three hundred ten million, three hundred twenty-two thousand, one hundred thirty-one".