90134169710221 has 36 divisors (see below), whose sum is σ = 119511313264800. Its totient is φ = 67561529057568.

The previous prime is 90134169710213. The next prime is 90134169710243. The reversal of 90134169710221 is 12201796143109.

It is not a de Polignac number, because 90134169710221 - 2³ = 90134169710213 is a prime.

It is a super-2 number, since 2×90134169710221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90134169710021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 286275681 + ... + 286590358.

It is an arithmetic number, because the mean of its divisors is an integer number (3319758701800).

Almost surely, 2^{90134169710221} is an apocalyptic number.

90134169710221 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

90134169710221 is a deficient number, since it is larger than the sum of its proper divisors (29377143554579).

90134169710221 is a wasteful number, since it uses less digits than its factorization.

90134169710221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572866098 (or 572866078 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 90134169710221 in words is "ninety trillion, one hundred thirty-four billion, one hundred sixty-nine million, seven hundred ten thousand, two hundred twenty-one".