12121220964 has 12 divisors (see below), whose sum is σ = 28282848944. Its totient is φ = 4040406984.

The previous prime is 12121220963. The next prime is 12121221011. The reversal of 12121220964 is 46902212121.

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

It is a super-2 number, since 2×12121220964² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121220963) 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, 505050862 + ... + 505050885.

Almost surely, 2^12121220964 is an apocalyptic number.

It is an amenable number.

12121220964 is an abundant number, since it is smaller than the sum of its proper divisors (16161627980).

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

12121220964 is a wasteful number, since it uses less digits than its factorization.

12121220964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010101754 (or 1010101752 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 12121220964 in words is "twelve billion, one hundred twenty-one million, two hundred twenty thousand, nine hundred sixty-four".