13801221992171 has 2 divisors, whose sum is σ = 13801221992172. Its totient is φ = 13801221992170.

The previous prime is 13801221992149. The next prime is 13801221992213. The reversal of 13801221992171 is 17129912210831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13801221992171 is a prime.

It is not a weakly prime, because it can be changed into another prime (13801221994171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6900610996085 + 6900610996086.

It is an arithmetic number, because the mean of its divisors is an integer number (6900610996086).

Almost surely, 2^{13801221992171} is an apocalyptic number.

13801221992171 is a deficient number, since it is larger than the sum of its proper divisors (1).

13801221992171 is an equidigital number, since it uses as much as digits as its factorization.

13801221992171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 47.

The spelling of 13801221992171 in words is "thirteen trillion, eight hundred one billion, two hundred twenty-one million, nine hundred ninety-two thousand, one hundred seventy-one".