1131313131 has 12 divisors (see below), whose sum is σ = 1759820608. Its totient is φ = 696192624.

The previous prime is 1131313129. The next prime is 1131313177. The reversal of 1131313131 is 1313131311.

It is not a de Polignac number, because 1131313131 - 2¹ = 1131313129 is a prime.

It is a super-2 number, since 2×1131313131² = 2559738800746046322, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1131313111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4834555 + ... + 4834788.

Almost surely, 2^1131313131 is an apocalyptic number.

1131313131 is a deficient number, since it is larger than the sum of its proper divisors (628507477).

1131313131 is a wasteful number, since it uses less digits than its factorization.

1131313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9669362 (or 9669359 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 1131313131 is about 33634.9986026460. The cubic root of 1131313131 is about 1041.9837417627.

Adding to 1131313131 its reverse (1313131311), we get a palindrome (2444444442).

The spelling of 1131313131 in words is "one billion, one hundred thirty-one million, three hundred thirteen thousand, one hundred thirty-one".