12011211999 has 12 divisors (see below), whose sum is σ = 17350990176. Its totient is φ = 8006800032.

The previous prime is 12011211941. The next prime is 12011212001. The reversal of 12011211999 is 99911211021.

It is not a de Polignac number, because 12011211999 - 2⁸ = 12011211743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011211899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71907 + ... + 170859.

It is an arithmetic number, because the mean of its divisors is an integer number (1445915848).

Almost surely, 2^12011211999 is an apocalyptic number.

12011211999 is a deficient number, since it is larger than the sum of its proper divisors (5339778177).

12011211999 is a wasteful number, since it uses less digits than its factorization.

12011211999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112446 (or 112443 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 12011211999 in words is "twelve billion, eleven million, two hundred eleven thousand, nine hundred ninety-nine".