1121323131 has 12 divisors (see below), whose sum is σ = 1630417360. Its totient is φ = 742597200.

The previous prime is 1121323127. The next prime is 1121323139. The reversal of 1121323131 is 1313231211.

It is not a de Polignac number, because 1121323131 - 2² = 1121323127 is a prime.

It is a super-2 number, since 2×1121323131² = 2514731128231286322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121323139) 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, 411196 + ... + 413913.

Almost surely, 2^1121323131 is an apocalyptic number.

1121323131 is a deficient number, since it is larger than the sum of its proper divisors (509094229).

1121323131 is a wasteful number, since it uses less digits than its factorization.

1121323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825266 (or 825263 counting only the distinct ones).

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

The square root of 1121323131 is about 33486.1632767924. The cubic root of 1121323131 is about 1038.9076088357.

Adding to 1121323131 its reverse (1313231211), we get a palindrome (2434554342).

The spelling of 1121323131 in words is "one billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty-one".