12220999998 has 16 divisors (see below), whose sum is σ = 25504695936. Its totient is φ = 3896550680.

The previous prime is 12220999991. The next prime is 12221000003. The reversal of 12220999998 is 89999902221.

It is a super-2 number, since 2×12220999998² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44278848 + ... + 44279123.

It is an arithmetic number, because the mean of its divisors is an integer number (1594043496).

Almost surely, 2^12220999998 is an apocalyptic number.

12220999998 is an abundant number, since it is smaller than the sum of its proper divisors (13283695938).

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

12220999998 is a wasteful number, since it uses less digits than its factorization.

12220999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88557999.

The product of its (nonzero) digits is 3779136, while the sum is 60.

The spelling of 12220999998 in words is "twelve billion, two hundred twenty million, nine hundred ninety-nine thousand, nine hundred ninety-eight".