1131011031 has 4 divisors (see below), whose sum is σ = 1508014712. Its totient is φ = 754007352.

The previous prime is 1131011023. The next prime is 1131011033. The reversal of 1131011031 is 1301101311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1131011031 - 2³ = 1131011023 is a prime.

It is a super-2 number, since 2×1131011031² = 2558371904487365922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131010998 and 1131011016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131011033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188501836 + ... + 188501841.

It is an arithmetic number, because the mean of its divisors is an integer number (377003678).

Almost surely, 2^1131011031 is an apocalyptic number.

1131011031 is a deficient number, since it is larger than the sum of its proper divisors (377003681).

1131011031 is an equidigital number, since it uses as much as digits as its factorization.

1131011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377003680.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 1131011031 is about 33630.5074448781. The cubic root of 1131011031 is about 1041.8909848583.

Adding to 1131011031 its reverse (1301101311), we get a palindrome (2432112342).

The spelling of 1131011031 in words is "one billion, one hundred thirty-one million, eleven thousand, thirty-one".