12221000080 has 40 divisors (see below), whose sum is σ = 28803069432. Its totient is φ = 4821433344.

The previous prime is 12221000053. The next prime is 12221000081. The reversal of 12221000080 is 8000012221.

It can be written as a sum of positive squares in 4 ways, for example, as 1024144 + 12219975936 = 1012^2 + 110544^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (12221000081) 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, 1040479 + ... + 1052158.

Almost surely, 2^12221000080 is an apocalyptic number.

12221000080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221000080 is an abundant number, since it is smaller than the sum of its proper divisors (16582069352).

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

12221000080 is a wasteful number, since it uses less digits than its factorization.

12221000080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092723 (or 2092717 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The spelling of 12221000080 in words is "twelve billion, two hundred twenty-one million, eighty", and thus it is an aban number.