221010203131 has 16 divisors (see below), whose sum is σ = 223068172320. Its totient is φ = 218964049920.

The previous prime is 221010203093. The next prime is 221010203143. The reversal of 221010203131 is 131302010122.

It is a cyclic number.

It is not a de Polignac number, because 221010203131 - 2²⁵ = 220976648699 is a prime.

It is a super-2 number, since 2×221010203131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010203731) 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, 50124855 + ... + 50129263.

It is an arithmetic number, because the mean of its divisors is an integer number (13941760770).

Almost surely, 2^221010203131 is an apocalyptic number.

221010203131 is a deficient number, since it is larger than the sum of its proper divisors (2057969189).

221010203131 is a wasteful number, since it uses less digits than its factorization.

221010203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221010203131 its reverse (131302010122), we get a palindrome (352312213253).

The spelling of 221010203131 in words is "two hundred twenty-one billion, ten million, two hundred three thousand, one hundred thirty-one".