90190222021 has 8 divisors (see below), whose sum is σ = 90297043200. Its totient is φ = 90083448432.

The previous prime is 90190222019. The next prime is 90190222027. The reversal of 90190222021 is 12022209109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90190222021 - 2¹ = 90190222019 is a prime.

It is a super-2 number, since 2×90190222021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90190222027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4946680 + ... + 4964878.

It is an arithmetic number, because the mean of its divisors is an integer number (11287130400).

Almost surely, 2^90190222021 is an apocalyptic number.

It is an amenable number.

90190222021 is a deficient number, since it is larger than the sum of its proper divisors (106821179).

90190222021 is a wasteful number, since it uses less digits than its factorization.

90190222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23795.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 90190222021 in words is "ninety billion, one hundred ninety million, two hundred twenty-two thousand, twenty-one".