12220001998 has 16 divisors (see below), whose sum is σ = 18501308496. Its totient is φ = 6053057920.

The previous prime is 12220001953. The next prime is 12220002007. The reversal of 12220001998 is 89910002221.

It is a super-2 number, since 2×12220001998² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116040 + ... + 194692.

It is an arithmetic number, because the mean of its divisors is an integer number (1156331781).

Almost surely, 2^12220001998 is an apocalyptic number.

12220001998 is a deficient number, since it is larger than the sum of its proper divisors (6281306498).

12220001998 is a wasteful number, since it uses less digits than its factorization.

12220001998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79379.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 12220001998 in words is "twelve billion, two hundred twenty million, one thousand, nine hundred ninety-eight".