90221101 has 4 divisors (see below), whose sum is σ = 94969600. Its totient is φ = 85472604.

The previous prime is 90221093. The next prime is 90221119. The reversal of 90221101 is 10112209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90221101 - 2³ = 90221093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90221171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374221 + ... + 2374258.

It is an arithmetic number, because the mean of its divisors is an integer number (23742400).

Almost surely, 2^90221101 is an apocalyptic number.

It is an amenable number.

90221101 is a deficient number, since it is larger than the sum of its proper divisors (4748499).

90221101 is a wasteful number, since it uses less digits than its factorization.

90221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748498.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 90221101 is about 9498.4788782204. The cubic root of 90221101 is about 448.5071534640.

The spelling of 90221101 in words is "ninety million, two hundred twenty-one thousand, one hundred one".