12121200999998 has 4 divisors (see below), whose sum is σ = 18181801500000. Its totient is φ = 6060600499998.

The previous prime is 12121200999937. The next prime is 12121201000009. The reversal of 12121200999998 is 89999900212121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12121200999998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030300249998 + ... + 3030300250001.

It is an arithmetic number, because the mean of its divisors is an integer number (4545450375000).

Almost surely, 2^{12121200999998} is an apocalyptic number.

12121200999998 is a deficient number, since it is larger than the sum of its proper divisors (6060600500002).

12121200999998 is an equidigital number, since it uses as much as digits as its factorization.

12121200999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060600500001.

The product of its (nonzero) digits is 3779136, while the sum is 62.

The spelling of 12121200999998 in words is "twelve trillion, one hundred twenty-one billion, two hundred million, nine hundred ninety-nine thousand, nine hundred ninety-eight".