2122111202173 has 2 divisors, whose sum is σ = 2122111202174. Its totient is φ = 2122111202172.

The previous prime is 2122111202153. The next prime is 2122111202207. The reversal of 2122111202173 is 3712021112212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1205347081689 + 916764120484 = 1097883^2 + 957478^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122111202173 - 2²¹ = 2122109105021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122111202153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061055601086 + 1061055601087.

It is an arithmetic number, because the mean of its divisors is an integer number (1061055601087).

Almost surely, 2^{2122111202173} is an apocalyptic number.

It is an amenable number.

2122111202173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122111202173 is an equidigital number, since it uses as much as digits as its factorization.

2122111202173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 2122111202173 its reverse (3712021112212), we get a palindrome (5834132314385).

The spelling of 2122111202173 in words is "two trillion, one hundred twenty-two billion, one hundred eleven million, two hundred two thousand, one hundred seventy-three".