12222199998 has 40 divisors (see below), whose sum is σ = 27418327992. Its totient is φ = 4069373904.

The previous prime is 12222199993. The next prime is 12222200041. The reversal of 12222199998 is 89999122221.

It is a super-2 number, since 2×12222199998² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222199993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99061 + ... + 185087.

Almost surely, 2^12222199998 is an apocalyptic number.

12222199998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12222199998 is an abundant number, since it is smaller than the sum of its proper divisors (15196127994).

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

12222199998 is an equidigital number, since it uses as much as digits as its factorization.

12222199998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86918 (or 86909 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The spelling of 12222199998 in words is "twelve billion, two hundred twenty-two million, one hundred ninety-nine thousand, nine hundred ninety-eight".