1131200231 has 12 divisors (see below), whose sum is σ = 1321645320. Its totient is φ = 965356560.

The previous prime is 1131200219. The next prime is 1131200233. The reversal of 1131200231 is 1320021311.

It is not a de Polignac number, because 1131200231 - 2⁶ = 1131200167 is a prime.

It is a super-2 number, since 2×1131200231² = 2559227925228906722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131200233) 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 11 ways as a sum of consecutive naturals, for example, 39185 + ... + 61626.

It is an arithmetic number, because the mean of its divisors is an integer number (110137110).

Almost surely, 2^1131200231 is an apocalyptic number.

1131200231 is a deficient number, since it is larger than the sum of its proper divisors (190445089).

1131200231 is a wasteful number, since it uses less digits than its factorization.

1131200231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101054 (or 101047 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131200231 is about 33633.3202494193. The cubic root of 1131200231 is about 1041.9490788344.

Adding to 1131200231 its reverse (1320021311), we get a palindrome (2451221542).

The spelling of 1131200231 in words is "one billion, one hundred thirty-one million, two hundred thousand, two hundred thirty-one".