122172744191 has 2 divisors, whose sum is σ = 122172744192. Its totient is φ = 122172744190.

The previous prime is 122172744181. The next prime is 122172744203. The reversal of 122172744191 is 191447271221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122172744191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122172744181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61086372095 + 61086372096.

It is an arithmetic number, because the mean of its divisors is an integer number (61086372096).

Almost surely, 2^122172744191 is an apocalyptic number.

122172744191 is a deficient number, since it is larger than the sum of its proper divisors (1).

122172744191 is an equidigital number, since it uses as much as digits as its factorization.

122172744191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The spelling of 122172744191 in words is "one hundred twenty-two billion, one hundred seventy-two million, seven hundred forty-four thousand, one hundred ninety-one".