2121001110199 has 2 divisors, whose sum is σ = 2121001110200. Its totient is φ = 2121001110198.

The previous prime is 2121001110191. The next prime is 2121001110203. The reversal of 2121001110199 is 9910111001212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121001110199 - 2³ = 2121001110191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121001110191) 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, 1060500555099 + 1060500555100.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500555100).

Almost surely, 2^{2121001110199} is an apocalyptic number.

2121001110199 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121001110199 is an equidigital number, since it uses as much as digits as its factorization.

2121001110199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 2121001110199 in words is "two trillion, one hundred twenty-one billion, one million, one hundred ten thousand, one hundred ninety-nine".