15221055502271 has 2 divisors, whose sum is σ = 15221055502272. Its totient is φ = 15221055502270.

The previous prime is 15221055502207. The next prime is 15221055502309. The reversal of 15221055502271 is 17220555012251.

It is an a-pointer prime, because the next prime (15221055502309) can be obtained adding 15221055502271 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15221055502271 - 2⁶ = 15221055502207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15221055501271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7610527751135 + 7610527751136.

It is an arithmetic number, because the mean of its divisors is an integer number (7610527751136).

Almost surely, 2^{15221055502271} is an apocalyptic number.

15221055502271 is a deficient number, since it is larger than the sum of its proper divisors (1).

15221055502271 is an equidigital number, since it uses as much as digits as its factorization.

15221055502271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70000, while the sum is 38.

The spelling of 15221055502271 in words is "fifteen trillion, two hundred twenty-one billion, fifty-five million, five hundred two thousand, two hundred seventy-one".