12001971318 has 16 divisors (see below), whose sum is σ = 24332764656. Its totient is φ = 3945853440.

The previous prime is 12001971313. The next prime is 12001971341. The reversal of 12001971318 is 81317910021.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001971313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13700443 + ... + 13701318.

It is an arithmetic number, because the mean of its divisors is an integer number (1520797791).

Almost surely, 2^12001971318 is an apocalyptic number.

12001971318 is an abundant number, since it is smaller than the sum of its proper divisors (12330793338).

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

12001971318 is a wasteful number, since it uses less digits than its factorization.

12001971318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27401839.

The product of its (nonzero) digits is 3024, while the sum is 33.

The spelling of 12001971318 in words is "twelve billion, one million, nine hundred seventy-one thousand, three hundred eighteen".