12101021221999 has 2 divisors, whose sum is σ = 12101021222000. Its totient is φ = 12101021221998.

The previous prime is 12101021221979. The next prime is 12101021222009. The reversal of 12101021221999 is 99912212010121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12101021221999 - 2⁷ = 12101021221871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101021221979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050510610999 + 6050510611000.

It is an arithmetic number, because the mean of its divisors is an integer number (6050510611000).

Almost surely, 2^{12101021221999} is an apocalyptic number.

12101021221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101021221999 is an equidigital number, since it uses as much as digits as its factorization.

12101021221999 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 40.

The spelling of 12101021221999 in words is "twelve trillion, one hundred one billion, twenty-one million, two hundred twenty-one thousand, nine hundred ninety-nine".