220131013231 has 4 divisors (see below), whose sum is σ = 220133246872. Its totient is φ = 220128779592.

The previous prime is 220131013211. The next prime is 220131013241. The reversal of 220131013231 is 132310131022.

220131013231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132310131022 = 2 ⋅66155065511.

It is a cyclic number.

It is not a de Polignac number, because 220131013231 - 2⁵ = 220131013199 is a prime.

It is a super-2 number, since 2×220131013231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220131013199 and 220131013208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220131013211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961821 + ... + 1168486.

It is an arithmetic number, because the mean of its divisors is an integer number (55033311718).

Almost surely, 2^220131013231 is an apocalyptic number.

220131013231 is a deficient number, since it is larger than the sum of its proper divisors (2233641).

220131013231 is a wasteful number, since it uses less digits than its factorization.

220131013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233640.

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

Adding to 220131013231 its reverse (132310131022), we get a palindrome (352441144253).

The spelling of 220131013231 in words is "two hundred twenty billion, one hundred thirty-one million, thirteen thousand, two hundred thirty-one".