12111212199 has 32 divisors (see below), whose sum is σ = 18049582080. Its totient is φ = 7178637312.

The previous prime is 12111212167. The next prime is 12111212207. The reversal of 12111212199 is 99121211121.

It is not a de Polignac number, because 12111212199 - 2⁵ = 12111212167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111212149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324354 + ... + 359760.

It is an arithmetic number, because the mean of its divisors is an integer number (564049440).

Almost surely, 2^12111212199 is an apocalyptic number.

12111212199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12111212199 is a deficient number, since it is larger than the sum of its proper divisors (5938369881).

12111212199 is a wasteful number, since it uses less digits than its factorization.

12111212199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35799.

The product of its digits is 648, while the sum is 30.

The spelling of 12111212199 in words is "twelve billion, one hundred eleven million, two hundred twelve thousand, one hundred ninety-nine".