1312133112 has 24 divisors (see below), whose sum is σ = 3553694040. Its totient is φ = 437377680.

The previous prime is 1312133107. The next prime is 1312133143. The reversal of 1312133112 is 2113312131.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9111964 + ... + 9112107.

It is an arithmetic number, because the mean of its divisors is an integer number (148070585).

Almost surely, 2^1312133112 is an apocalyptic number.

1312133112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312133112 is an abundant number, since it is smaller than the sum of its proper divisors (2241560928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312133112 is a wasteful number, since it uses less digits than its factorization.

1312133112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18224083 (or 18224076 counting only the distinct ones).

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

The square root of 1312133112 is about 36223.3779761082. The cubic root of 1312133112 is about 1094.7777568603. Note that the first 4 decimals are identical.

Adding to 1312133112 its reverse (2113312131), we get a palindrome (3425445243).

The spelling of 1312133112 in words is "one billion, three hundred twelve million, one hundred thirty-three thousand, one hundred twelve".