1312233012 has 18 divisors (see below), whose sum is σ = 3317033538. Its totient is φ = 437410992.

The previous prime is 1312233011. The next prime is 1312233031. The reversal of 1312233012 is 2103322131.

It can be written as a sum of positive squares in only one way, i.e., 845413776 + 466819236 = 29076^2 + 21606^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312233011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18225423 + ... + 18225494.

It is an arithmetic number, because the mean of its divisors is an integer number (184279641).

Almost surely, 2^1312233012 is an apocalyptic number.

1312233012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312233012 is an abundant number, since it is smaller than the sum of its proper divisors (2004800526).

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

1312233012 is a wasteful number, since it uses less digits than its factorization.

1312233012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36450927 (or 36450922 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312233012 is about 36224.7568935942. The cubic root of 1312233012 is about 1094.8055399974.

Adding to 1312233012 its reverse (2103322131), we get a palindrome (3415555143).

The spelling of 1312233012 in words is "one billion, three hundred twelve million, two hundred thirty-three thousand, twelve".