1131012131 has 4 divisors (see below), whose sum is σ = 1139267832. Its totient is φ = 1122756432.

The previous prime is 1131012067. The next prime is 1131012137. The reversal of 1131012131 is 1312101311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312101311 = 41 ⋅32002471.

It is a cyclic number.

It is not a de Polignac number, because 1131012131 - 2⁶ = 1131012067 is a prime.

It is a super-2 number, since 2×1131012131² = 2558376880938322322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131012137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4127645 + ... + 4127918.

It is an arithmetic number, because the mean of its divisors is an integer number (284816958).

Almost surely, 2^1131012131 is an apocalyptic number.

1131012131 is a deficient number, since it is larger than the sum of its proper divisors (8255701).

1131012131 is an equidigital number, since it uses as much as digits as its factorization.

1131012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8255700.

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

The square root of 1131012131 is about 33630.5237990728. The cubic root of 1131012131 is about 1041.8913226327.

Adding to 1131012131 its reverse (1312101311), we get a palindrome (2443113442).

The spelling of 1131012131 in words is "one billion, one hundred thirty-one million, twelve thousand, one hundred thirty-one".