1220313120231 has 16 divisors (see below), whose sum is σ = 1637469033984. Its totient is φ = 808353464544.

The previous prime is 1220313120211. The next prime is 1220313120263. The reversal of 1220313120231 is 1320213130221.

It is not a de Polignac number, because 1220313120231 - 2³³ = 1211723185639 is a prime.

It is a super-2 number, since 2×1220313120231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220313120198 and 1220313120207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220313120211) 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, 804766 + ... + 1757348.

It is an arithmetic number, because the mean of its divisors is an integer number (102341814624).

Almost surely, 2^{1220313120231} is an apocalyptic number.

1220313120231 is a deficient number, since it is larger than the sum of its proper divisors (417155913753).

1220313120231 is a wasteful number, since it uses less digits than its factorization.

1220313120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955310.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1220313120231 its reverse (1320213130221), we get a palindrome (2540526250452).

The spelling of 1220313120231 in words is "one trillion, two hundred twenty billion, three hundred thirteen million, one hundred twenty thousand, two hundred thirty-one".