1231312132 has 6 divisors (see below), whose sum is σ = 2154796238. Its totient is φ = 615656064.

The previous prime is 1231312111. The next prime is 1231312151. The reversal of 1231312132 is 2312131321.

It can be written as a sum of positive squares in only one way, i.e., 1159130116 + 72182016 = 34046^2 + 8496^2 .

It is a super-2 number, since 2×1231312132² = 3032259132820770848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153914013 + ... + 153914020.

Almost surely, 2^1231312132 is an apocalyptic number.

It is an amenable number.

1231312132 is a deficient number, since it is larger than the sum of its proper divisors (923484106).

1231312132 is a wasteful number, since it uses less digits than its factorization.

1231312132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307828037 (or 307828035 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1231312132 is about 35090.0574522186. The cubic root of 1231312132 is about 1071.8221295163.

Adding to 1231312132 its reverse (2312131321), we get a palindrome (3543443453).

The spelling of 1231312132 in words is "one billion, two hundred thirty-one million, three hundred twelve thousand, one hundred thirty-two".