12000001999 has 2 divisors, whose sum is σ = 12000002000. Its totient is φ = 12000001998.

The previous prime is 12000001921. The next prime is 12000002011. The reversal of 12000001999 is 99910000021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12000001999 - 2¹³ = 11999993807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12000001999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12000002999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000000999 + 6000001000.

It is an arithmetic number, because the mean of its divisors is an integer number (6000001000).

Almost surely, 2^12000001999 is an apocalyptic number.

12000001999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000001999 is an equidigital number, since it uses as much as digits as its factorization.

12000001999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 12000001999 in words is "twelve billion, one thousand, nine hundred ninety-nine".