12201984864 has 36 divisors (see below), whose sum is σ = 34699395276. Its totient is φ = 4067328192.

The previous prime is 12201984857. The next prime is 12201984869. The reversal of 12201984864 is 46848910221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201984869) 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, 21183714 + ... + 21184289.

It is an arithmetic number, because the mean of its divisors is an integer number (963872091).

Almost surely, 2^12201984864 is an apocalyptic number.

It is an amenable number.

12201984864 is an abundant number, since it is smaller than the sum of its proper divisors (22497410412).

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

12201984864 is a wasteful number, since it uses less digits than its factorization.

12201984864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42368019 (or 42368008 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 12201984864 in words is "twelve billion, two hundred one million, nine hundred eighty-four thousand, eight hundred sixty-four".