12121111102099 has 4 divisors (see below), whose sum is σ = 12188826806760. Its totient is φ = 12053395397440.

The previous prime is 12121111102097. The next prime is 12121111102117. The reversal of 12121111102099 is 99020111112121.

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

It is a cyclic number.

It is not a de Polignac number, because 12121111102099 - 2¹ = 12121111102097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121111102099.

It is not an unprimeable number, because it can be changed into a prime (12121111102091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33857852062 + ... + 33857852419.

It is an arithmetic number, because the mean of its divisors is an integer number (3047206701690).

Almost surely, 2^{12121111102099} is an apocalyptic number.

12121111102099 is a deficient number, since it is larger than the sum of its proper divisors (67715704661).

12121111102099 is an equidigital number, since it uses as much as digits as its factorization.

12121111102099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67715704660.

The product of its (nonzero) digits is 648, while the sum is 31.

The spelling of 12121111102099 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, ninety-nine".