121002199999 has 2 divisors, whose sum is σ = 121002200000. Its totient is φ = 121002199998.

The previous prime is 121002199987. The next prime is 121002200021. The reversal of 121002199999 is 999991200121.

It is a weak prime.

It is an emirp because it is prime and its reverse (999991200121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121002199999 - 2¹⁷ = 121002068927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121002199099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501099999 + 60501100000.

It is an arithmetic number, because the mean of its divisors is an integer number (60501100000).

Almost surely, 2^121002199999 is an apocalyptic number.

121002199999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002199999 is an equidigital number, since it uses as much as digits as its factorization.

121002199999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 52.

The spelling of 121002199999 in words is "one hundred twenty-one billion, two million, one hundred ninety-nine thousand, nine hundred ninety-nine".