12101221211999 has 2 divisors, whose sum is σ = 12101221212000. Its totient is φ = 12101221211998.

The previous prime is 12101221211993. The next prime is 12101221212023. The reversal of 12101221211999 is 99911212210121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101221211999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101221211993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050610605999 + 6050610606000.

It is an arithmetic number, because the mean of its divisors is an integer number (6050610606000).

Almost surely, 2^{12101221211999} is an apocalyptic number.

12101221211999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101221211999 is an equidigital number, since it uses as much as digits as its factorization.

12101221211999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 41.

The spelling of 12101221211999 in words is "twelve trillion, one hundred one billion, two hundred twenty-one million, two hundred eleven thousand, nine hundred ninety-nine".