90201001171 has 2 divisors, whose sum is σ = 90201001172. Its totient is φ = 90201001170.

The previous prime is 90201001159. The next prime is 90201001193. The reversal of 90201001171 is 17110010209.

It is an a-pointer prime, because the next prime (90201001193) can be obtained adding 90201001171 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90201001171 - 2²³ = 90192612563 is a prime.

It is a super-2 number, since 2×90201001171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90201001271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45100500585 + 45100500586.

It is an arithmetic number, because the mean of its divisors is an integer number (45100500586).

Almost surely, 2^90201001171 is an apocalyptic number.

90201001171 is a deficient number, since it is larger than the sum of its proper divisors (1).

90201001171 is an equidigital number, since it uses as much as digits as its factorization.

90201001171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 22.

The spelling of 90201001171 in words is "ninety billion, two hundred one million, one thousand, one hundred seventy-one".