12121200999999 has 96 divisors (see below), whose sum is σ = 22602081116160. Its totient is φ = 6088442340096.

The previous prime is 12121200999937. The next prime is 12121201000009. The reversal of 12121200999999 is 99999900212121.

It is not a de Polignac number, because 12121200999999 - 2⁹ = 12121200999487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

12121200999999 is a modest number, since divided by 999999 gives 121212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121200999499) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2831079 + ... + 5679560.

It is an arithmetic number, because the mean of its divisors is an integer number (235438344960).

Almost surely, 2^{12121200999999} is an apocalyptic number.

12121200999999 is a deficient number, since it is larger than the sum of its proper divisors (10480880116161).

12121200999999 is a wasteful number, since it uses less digits than its factorization.

12121200999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8510749 (or 8510746 counting only the distinct ones).

The product of its (nonzero) digits is 4251528, while the sum is 63.

The spelling of 12121200999999 in words is "twelve trillion, one hundred twenty-one billion, two hundred million, nine hundred ninety-nine thousand, nine hundred ninety-nine".