1131210131 has 4 divisors (see below), whose sum is σ = 1158800664. Its totient is φ = 1103619600.

The previous prime is 1131210103. The next prime is 1131210133. The reversal of 1131210131 is 1310121311.

It is a happy number.

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 1131210131 - 2²⁶ = 1064101267 is a prime.

It is a super-2 number, since 2×1131210131² = 2559272720954074322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131210133) 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, 13795205 + ... + 13795286.

It is an arithmetic number, because the mean of its divisors is an integer number (289700166).

Almost surely, 2^1131210131 is an apocalyptic number.

1131210131 is a deficient number, since it is larger than the sum of its proper divisors (27590533).

1131210131 is an equidigital number, since it uses as much as digits as its factorization.

1131210131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27590532.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1131210131 is about 33633.4674245758. The cubic root of 1131210131 is about 1041.9521184571.

Adding to 1131210131 its reverse (1310121311), we get a palindrome (2441331442).

The spelling of 1131210131 in words is "one billion, one hundred thirty-one million, two hundred ten thousand, one hundred thirty-one".