12198912198 has 32 divisors (see below), whose sum is σ = 26792093952. Its totient is φ = 3672156000.

The previous prime is 12198912191. The next prime is 12198912199. The reversal of 12198912198 is 89121989121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12198912198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12198912191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602061 + ... + 621992.

It is an arithmetic number, because the mean of its divisors is an integer number (837252936).

Almost surely, 2^12198912198 is an apocalyptic number.

12198912198 is an abundant number, since it is smaller than the sum of its proper divisors (14593181754).

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

12198912198 is a wasteful number, since it uses less digits than its factorization.

12198912198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224220.

The product of its digits is 186624, while the sum is 51.

The spelling of 12198912198 in words is "twelve billion, one hundred ninety-eight million, nine hundred twelve thousand, one hundred ninety-eight".