221320113031 has 16 divisors (see below), whose sum is σ = 223489234080. Its totient is φ = 219160206720.

The previous prime is 221320113013. The next prime is 221320113143. The reversal of 221320113031 is 130311023122.

It is a cyclic number.

It is not a de Polignac number, because 221320113031 - 2²¹ = 221318015879 is a prime.

It is a super-2 number, since 2×221320113031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221320113011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161193861 + ... + 161195233.

It is an arithmetic number, because the mean of its divisors is an integer number (13968077130).

Almost surely, 2^221320113031 is an apocalyptic number.

221320113031 is a deficient number, since it is larger than the sum of its proper divisors (2169121049).

221320113031 is a wasteful number, since it uses less digits than its factorization.

221320113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221320113031 its reverse (130311023122), we get a palindrome (351631136153).

The spelling of 221320113031 in words is "two hundred twenty-one billion, three hundred twenty million, one hundred thirteen thousand, thirty-one".