2111131122173 has 2 divisors, whose sum is σ = 2111131122174. Its totient is φ = 2111131122172.

The previous prime is 2111131122151. The next prime is 2111131122211. The reversal of 2111131122173 is 3712211311112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1759408586329 + 351722535844 = 1326427^2 + 593062^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111131122173 - 2⁸ = 2111131121917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111131122473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055565561086 + 1055565561087.

It is an arithmetic number, because the mean of its divisors is an integer number (1055565561087).

Almost surely, 2^{2111131122173} is an apocalyptic number.

It is an amenable number.

2111131122173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111131122173 is an equidigital number, since it uses as much as digits as its factorization.

2111131122173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 26.

Adding to 2111131122173 its reverse (3712211311112), we get a palindrome (5823342433285).

The spelling of 2111131122173 in words is "two trillion, one hundred eleven billion, one hundred thirty-one million, one hundred twenty-two thousand, one hundred seventy-three".