1131200331 has 4 divisors (see below), whose sum is σ = 1508267112. Its totient is φ = 754133552.

The previous prime is 1131200311. The next prime is 1131200351. The reversal of 1131200331 is 1330021311.

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

It is an interprime number because it is at equal distance from previous prime (1131200311) and next prime (1131200351).

It is a cyclic number.

It is not a de Polignac number, because 1131200331 - 2¹⁵ = 1131167563 is a prime.

It is a super-2 number, since 2×1131200331² = 2559228377709019122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131200331.

It is not an unprimeable number, because it can be changed into a prime (1131200311) 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, 188533386 + ... + 188533391.

It is an arithmetic number, because the mean of its divisors is an integer number (377066778).

Almost surely, 2^1131200331 is an apocalyptic number.

1131200331 is a deficient number, since it is larger than the sum of its proper divisors (377066781).

1131200331 is an equidigital number, since it uses as much as digits as its factorization.

1131200331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377066780.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1131200331 is about 33633.3217360403. The cubic root of 1131200331 is about 1041.9491095377.

Adding to 1131200331 its reverse (1330021311), we get a palindrome (2461221642).

The spelling of 1131200331 in words is "one billion, one hundred thirty-one million, two hundred thousand, three hundred thirty-one".