90231221011021 has 8 divisors (see below), whose sum is σ = 94980452586080. Its totient is φ = 85482011430288.

The previous prime is 90231221011007. The next prime is 90231221011037. The reversal of 90231221011021 is 12011012213209.

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 90231221011021 - 2⁵ = 90231221010989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90231221011091) 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, 3281830 + ... + 13828696.

It is an arithmetic number, because the mean of its divisors is an integer number (11872556573260).

Almost surely, 2^{90231221011021} is an apocalyptic number.

It is an amenable number.

90231221011021 is a deficient number, since it is larger than the sum of its proper divisors (4749231575059).

90231221011021 is a wasteful number, since it uses less digits than its factorization.

90231221011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10997163.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 90231221011021 in words is "ninety trillion, two hundred thirty-one billion, two hundred twenty-one million, eleven thousand, twenty-one".