221333221131 has 64 divisors (see below), whose sum is σ = 356125248000. Its totient is φ = 120689408000.

The previous prime is 221333221111. The next prime is 221333221141. The reversal of 221333221131 is 131122333122.

It is a cyclic number.

It is not a de Polignac number, because 221333221131 - 2⁷ = 221333221003 is a prime.

It is a super-2 number, since 2×221333221131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221333221111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1575820 + ... + 1710518.

It is an arithmetic number, because the mean of its divisors is an integer number (5564457000).

Almost surely, 2^221333221131 is an apocalyptic number.

221333221131 is a deficient number, since it is larger than the sum of its proper divisors (134792026869).

221333221131 is a wasteful number, since it uses less digits than its factorization.

221333221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134860.

The product of its digits is 1296, while the sum is 24.

Adding to 221333221131 its reverse (131122333122), we get a palindrome (352455554253).

The spelling of 221333221131 in words is "two hundred twenty-one billion, three hundred thirty-three million, two hundred twenty-one thousand, one hundred thirty-one".