121211101199 has 2 divisors, whose sum is σ = 121211101200. Its totient is φ = 121211101198.

The previous prime is 121211101181. The next prime is 121211101201. The reversal of 121211101199 is 991101112121.

It is a strong prime.

It is an emirp because it is prime and its reverse (991101112121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121211101199 - 2¹² = 121211097103 is a prime.

Together with 121211101201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121211106199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605550599 + 60605550600.

It is an arithmetic number, because the mean of its divisors is an integer number (60605550600).

Almost surely, 2^121211101199 is an apocalyptic number.

121211101199 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211101199 is an equidigital number, since it uses as much as digits as its factorization.

121211101199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 29.

The spelling of 121211101199 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred one thousand, one hundred ninety-nine".