12311001012 has 12 divisors (see below), whose sum is σ = 28725669056. Its totient is φ = 4103667000.

The previous prime is 12311000963. The next prime is 12311001013. The reversal of 12311001012 is 21010011321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1025916751 = 12311001012 / (1 + 2 + 3 + 1 + 1 + 0 + 0 + 1 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311001013) 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, 512958364 + ... + 512958387.

Almost surely, 2^12311001012 is an apocalyptic number.

12311001012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12311001012 is an abundant number, since it is smaller than the sum of its proper divisors (16414668044).

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

12311001012 is a wasteful number, since it uses less digits than its factorization.

12311001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025916758 (or 1025916756 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 12311001012 its reverse (21010011321), we get a palindrome (33321012333).

The spelling of 12311001012 in words is "twelve billion, three hundred eleven million, one thousand, twelve".