1320220131 has 16 divisors (see below), whose sum is σ = 1809927168. Its totient is φ = 855489600.

The previous prime is 1320220123. The next prime is 1320220141. The reversal of 1320220131 is 1310220231.

It is not a de Polignac number, because 1320220131 - 2³ = 1320220123 is a prime.

It is a super-2 number, since 2×1320220131² = 3485962388595314322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320220131.

It is not an unprimeable number, because it can be changed into a prime (1320220141) 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, 13530 + ... + 53136.

It is an arithmetic number, because the mean of its divisors is an integer number (113120448).

Almost surely, 2^1320220131 is an apocalyptic number.

1320220131 is a deficient number, since it is larger than the sum of its proper divisors (489707037).

1320220131 is a wasteful number, since it uses less digits than its factorization.

1320220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39922.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1320220131 is about 36334.8335760603. The cubic root of 1320220131 is about 1097.0222856805.

Adding to 1320220131 its reverse (1310220231), we get a palindrome (2630440362).

It can be divided in two parts, 13202 and 20131, that added together give a palindrome (33333).

The spelling of 1320220131 in words is "one billion, three hundred twenty million, two hundred twenty thousand, one hundred thirty-one".