12311211996 has 36 divisors (see below), whose sum is σ = 31238359152. Its totient is φ = 4088130624.

The previous prime is 12311211973. The next prime is 12311212003. The reversal of 12311211996 is 69911211321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 12311211996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 640681 + ... + 659616.

Almost surely, 2^12311211996 is an apocalyptic number.

It is an amenable number.

12311211996 is an abundant number, since it is smaller than the sum of its proper divisors (18927147156).

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

12311211996 is a wasteful number, since it uses less digits than its factorization.

12311211996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300570 (or 1300565 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The spelling of 12311211996 in words is "twelve billion, three hundred eleven million, two hundred eleven thousand, nine hundred ninety-six".