22905721397171 has 2 divisors, whose sum is σ = 22905721397172. Its totient is φ = 22905721397170.

The previous prime is 22905721397123. The next prime is 22905721397177. The reversal of 22905721397171 is 17179312750922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22905721397171 - 2⁴² = 18507674886067 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22905721397177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11452860698585 + 11452860698586.

It is an arithmetic number, because the mean of its divisors is an integer number (11452860698586).

Almost surely, 2^{22905721397171} is an apocalyptic number.

22905721397171 is a deficient number, since it is larger than the sum of its proper divisors (1).

22905721397171 is an equidigital number, since it uses as much as digits as its factorization.

22905721397171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3333960, while the sum is 56.

The spelling of 22905721397171 in words is "twenty-two trillion, nine hundred five billion, seven hundred twenty-one million, three hundred ninety-seven thousand, one hundred seventy-one".