12221236480 has 36 divisors (see below), whose sum is σ = 29273683572. Its totient is φ = 4888494080.

The previous prime is 12221236439. The next prime is 12221236481. The reversal of 12221236480 is 8463212221.

It can be written as a sum of positive squares in 2 ways, for example, as 8905319424 + 3315917056 = 94368^2 + 57584^2 .

It is a super-2 number, since 2×12221236480² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221236481) 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, 4772641 + ... + 4775200.

It is an arithmetic number, because the mean of its divisors is an integer number (813157877).

Almost surely, 2^12221236480 is an apocalyptic number.

12221236480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221236480 is an abundant number, since it is smaller than the sum of its proper divisors (17052447092).

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

12221236480 is an frugal number, since it uses more digits than its factorization.

12221236480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547862 (or 9547848 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 12221236480 in words is "twelve billion, two hundred twenty-one million, two hundred thirty-six thousand, four hundred eighty".