1313120131 has 4 divisors (see below), whose sum is σ = 1331108152. Its totient is φ = 1295132112.

The previous prime is 1313120129. The next prime is 1313120141. The reversal of 1313120131 is 1310213131.

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 1313120131 - 2¹ = 1313120129 is a prime.

It is a super-2 number, since 2×1313120131² = 3448568956874914322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313120141) 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, 8993901 + ... + 8994046.

It is an arithmetic number, because the mean of its divisors is an integer number (332777038).

Almost surely, 2^1313120131 is an apocalyptic number.

1313120131 is a deficient number, since it is larger than the sum of its proper divisors (17988021).

1313120131 is an equidigital number, since it uses as much as digits as its factorization.

1313120131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17988020.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1313120131 is about 36236.9994756740. Note that the first 3 decimals coincide. The cubic root of 1313120131 is about 1095.0521943664.

Adding to 1313120131 its reverse (1310213131), we get a palindrome (2623333262).

The spelling of 1313120131 in words is "one billion, three hundred thirteen million, one hundred twenty thousand, one hundred thirty-one".