221311274013 has 12 divisors (see below), whose sum is σ = 319746742848. Its totient is φ = 147506278920.

The previous prime is 221311274003. The next prime is 221311274059. The reversal of 221311274013 is 310472113122.

221311274013 is a `hidden beast` number, since 2 + 2 + 131 + 127 + 401 + 3 = 666.

It is not a de Polignac number, because 221311274013 - 2²⁵ = 221277719581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221311274003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2840295 + ... + 2917172.

It is an arithmetic number, because the mean of its divisors is an integer number (26645561904).

Almost surely, 2^221311274013 is an apocalyptic number.

It is an amenable number.

221311274013 is a deficient number, since it is larger than the sum of its proper divisors (98435468835).

221311274013 is a wasteful number, since it uses less digits than its factorization.

221311274013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5761744 (or 5761741 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 221311274013 its reverse (310472113122), we get a palindrome (531783387135).

The spelling of 221311274013 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred seventy-four thousand, thirteen".