2099208031901 has 2 divisors, whose sum is σ = 2099208031902. Its totient is φ = 2099208031900.

The previous prime is 2099208031897. The next prime is 2099208031903. The reversal of 2099208031901 is 1091308029902.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1940800051876 + 158407980025 = 1393126^2 + 398005^2 .

It is a cyclic number.

It is not a de Polignac number, because 2099208031901 - 2² = 2099208031897 is a prime.

It is a super-2 number, since 2×2099208031901² (a number of 25 digits) contains 22 as substring.

Together with 2099208031903, 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 (2099208031903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049604015950 + 1049604015951.

It is an arithmetic number, because the mean of its divisors is an integer number (1049604015951).

Almost surely, 2^{2099208031901} is an apocalyptic number.

It is an amenable number.

2099208031901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2099208031901 is an equidigital number, since it uses as much as digits as its factorization.

2099208031901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 2099208031901 in words is "two trillion, ninety-nine billion, two hundred eight million, thirty-one thousand, nine hundred one".