12900188398898 has 4 divisors (see below), whose sum is σ = 19350282598350. Its totient is φ = 6450094199448.

The previous prime is 12900188398897. The next prime is 12900188398939. The reversal of 12900188398898 is 89889388100921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10609436527369 + 2290751871529 = 3257213^2 + 1513523^2 .

It is a super-2 number, since 2×12900188398898² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12900188398897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225047099723 + ... + 3225047099726.

Almost surely, 2^{12900188398898} is an apocalyptic number.

12900188398898 is a deficient number, since it is larger than the sum of its proper divisors (6450094199452).

12900188398898 is an equidigital number, since it uses as much as digits as its factorization.

12900188398898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450094199451.

The product of its (nonzero) digits is 143327232, while the sum is 74.

The spelling of 12900188398898 in words is "twelve trillion, nine hundred billion, one hundred eighty-eight million, three hundred ninety-eight thousand, eight hundred ninety-eight".