90121221233 has 4 divisors (see below), whose sum is σ = 90124497408. Its totient is φ = 90117945060.

The previous prime is 90121221227. The next prime is 90121221257. The reversal of 90121221233 is 33212212109.

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 90121221233 - 2¹⁶ = 90121155697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90121221433) 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, 1596473 + ... + 1651958.

It is an arithmetic number, because the mean of its divisors is an integer number (22531124352).

Almost surely, 2^90121221233 is an apocalyptic number.

It is an amenable number.

90121221233 is a deficient number, since it is larger than the sum of its proper divisors (3276175).

90121221233 is a wasteful number, since it uses less digits than its factorization.

90121221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276174.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 90121221233 in words is "ninety billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred thirty-three".