221732120964 has 12 divisors (see below), whose sum is σ = 517374948944. Its totient is φ = 73910706984.

The previous prime is 221732120959. The next prime is 221732120969. The reversal of 221732120964 is 469021237122.

It is an interprime number because it is at equal distance from previous prime (221732120959) and next prime (221732120969).

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

It is not an unprimeable number, because it can be changed into a prime (221732120969) 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, 9238838362 + ... + 9238838385.

Almost surely, 2^221732120964 is an apocalyptic number.

It is an amenable number.

221732120964 is an abundant number, since it is smaller than the sum of its proper divisors (295642827980).

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

221732120964 is a wasteful number, since it uses less digits than its factorization.

221732120964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18477676754 (or 18477676752 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 221732120964 in words is "two hundred twenty-one billion, seven hundred thirty-two million, one hundred twenty thousand, nine hundred sixty-four".