90112221108 has 288 divisors, whose sum is σ = 285428183040. Its totient is φ = 23337642240.

The previous prime is 90112221103. The next prime is 90112221119. The reversal of 90112221108 is 80112221109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90112221103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 125329573 + ... + 125330291.

It is an arithmetic number, because the mean of its divisors is an integer number (991070080).

Almost surely, 2^90112221108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90112221108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142714091520).

90112221108 is an abundant number, since it is smaller than the sum of its proper divisors (195315961932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90112221108 is a wasteful number, since it uses less digits than its factorization.

90112221108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

Subtracting from 90112221108 its reverse (80112221109), we obtain a palindrome (9999999999).

The spelling of 90112221108 in words is "ninety billion, one hundred twelve million, two hundred twenty-one thousand, one hundred eight".