1320512131 has 4 divisors (see below), whose sum is σ = 1324052752. Its totient is φ = 1316971512.

The previous prime is 1320512113. The next prime is 1320512147. The reversal of 1320512131 is 1312150231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320512131 - 2²⁵ = 1286957699 is a prime.

It is a super-2 number, since 2×1320512131² = 3487504576236322322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320512099 and 1320512108.

It is not an unprimeable number, because it can be changed into a prime (1320512101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769751 + ... + 1770496.

It is an arithmetic number, because the mean of its divisors is an integer number (331013188).

Almost surely, 2^1320512131 is an apocalyptic number.

1320512131 is a deficient number, since it is larger than the sum of its proper divisors (3540621).

1320512131 is an equidigital number, since it uses as much as digits as its factorization.

1320512131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540620.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1320512131 is about 36338.8515366130. The cubic root of 1320512131 is about 1097.1031577731.

Adding to 1320512131 its reverse (1312150231), we get a palindrome (2632662362).

The spelling of 1320512131 in words is "one billion, three hundred twenty million, five hundred twelve thousand, one hundred thirty-one".