221344223131 has 2 divisors, whose sum is σ = 221344223132. Its totient is φ = 221344223130.

The previous prime is 221344223117. The next prime is 221344223167. The reversal of 221344223131 is 131322443122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221344223131 is a prime.

It is a super-2 number, since 2×221344223131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221344223131.

It is not a weakly prime, because it can be changed into another prime (221344283131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110672111565 + 110672111566.

It is an arithmetic number, because the mean of its divisors is an integer number (110672111566).

Almost surely, 2^221344223131 is an apocalyptic number.

221344223131 is a deficient number, since it is larger than the sum of its proper divisors (1).

221344223131 is an equidigital number, since it uses as much as digits as its factorization.

221344223131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 28.

Adding to 221344223131 its reverse (131322443122), we get a palindrome (352666666253).

The spelling of 221344223131 in words is "two hundred twenty-one billion, three hundred forty-four million, two hundred twenty-three thousand, one hundred thirty-one".