192121218173 has 2 divisors, whose sum is σ = 192121218174. Its totient is φ = 192121218172.

The previous prime is 192121218167. The next prime is 192121218203. The reversal of 192121218173 is 371812121291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137702592889 + 54418625284 = 371083^2 + 233278^2 .

It is a cyclic number.

It is not a de Polignac number, because 192121218173 - 2⁶ = 192121218109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (192121211173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96060609086 + 96060609087.

It is an arithmetic number, because the mean of its divisors is an integer number (96060609087).

Almost surely, 2^192121218173 is an apocalyptic number.

It is an amenable number.

192121218173 is a deficient number, since it is larger than the sum of its proper divisors (1).

192121218173 is an equidigital number, since it uses as much as digits as its factorization.

192121218173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 38.

The spelling of 192121218173 in words is "one hundred ninety-two billion, one hundred twenty-one million, two hundred eighteen thousand, one hundred seventy-three".