109315872176821 has 2 divisors, whose sum is σ = 109315872176822. Its totient is φ = 109315872176820.

The previous prime is 109315872176779. The next prime is 109315872176831. The reversal of 109315872176821 is 128671278513901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107746579811025 + 1569292365796 = 10380105^2 + 1252714^2 .

It is a cyclic number.

It is not a de Polignac number, because 109315872176821 - 2³⁵ = 109281512438453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109315872176821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109315872176831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54657936088410 + 54657936088411.

It is an arithmetic number, because the mean of its divisors is an integer number (54657936088411).

Almost surely, 2^{109315872176821} is an apocalyptic number.

It is an amenable number.

109315872176821 is a deficient number, since it is larger than the sum of its proper divisors (1).

109315872176821 is an equidigital number, since it uses as much as digits as its factorization.

109315872176821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 61.

The spelling of 109315872176821 in words is "one hundred nine trillion, three hundred fifteen billion, eight hundred seventy-two million, one hundred seventy-six thousand, eight hundred twenty-one".