121999292718211 has 2 divisors, whose sum is σ = 121999292718212. Its totient is φ = 121999292718210.

The previous prime is 121999292718067. The next prime is 121999292718223. The reversal of 121999292718211 is 112817292999121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121999292718211 - 2⁹ = 121999292717699 is a prime.

It is not a weakly prime, because it can be changed into another prime (121999292718011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60999646359105 + 60999646359106.

It is an arithmetic number, because the mean of its divisors is an integer number (60999646359106).

Almost surely, 2^{121999292718211} is an apocalyptic number.

121999292718211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121999292718211 is an equidigital number, since it uses as much as digits as its factorization.

121999292718211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 64.

The spelling of 121999292718211 in words is "one hundred twenty-one trillion, nine hundred ninety-nine billion, two hundred ninety-two million, seven hundred eighteen thousand, two hundred eleven".