1313212131 has 96 divisors (see below), whose sum is σ = 2446000128. Its totient is φ = 659171520.

The previous prime is 1313212099. The next prime is 1313212169. The reversal of 1313212131 is 1312123131.

1313212131 is a `hidden beast` number, since 131 + 321 + 213 + 1 = 666.

It is not a de Polignac number, because 1313212131 - 2⁵ = 1313212099 is a prime.

It is a super-2 number, since 2×1313212131² = 3449052202011122322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1313212231) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3784300 + ... + 3784646.

It is an arithmetic number, because the mean of its divisors is an integer number (25479168).

Almost surely, 2^1313212131 is an apocalyptic number.

1313212131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1313212131 is a deficient number, since it is larger than the sum of its proper divisors (1132787997).

1313212131 is a wasteful number, since it uses less digits than its factorization.

1313212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 538 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1313212131 is about 36238.2688742164. The cubic root of 1313212131 is about 1095.0777676675.

Adding to 1313212131 its reverse (1312123131), we get a palindrome (2625335262).

It can be divided in two parts, 1313 and 212131, that added together give a square (213444 = 462²).

The spelling of 1313212131 in words is "one billion, three hundred thirteen million, two hundred twelve thousand, one hundred thirty-one".