90344342213221 has 8 divisors (see below), whose sum is σ = 90351720549720. Its totient is φ = 90336964228608.

The previous prime is 90344342213219. The next prime is 90344342213249. The reversal of 90344342213221 is 12231224344309.

It can be written as a sum of positive squares in 4 ways, for example, as 11424305360196 + 78920036853025 = 3379986^2 + 8883695^2 .

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 90344342213221 - 2¹ = 90344342213219 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 (90344342213261) 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, 745176435 + ... + 745297663.

It is an arithmetic number, because the mean of its divisors is an integer number (11293965068715).

Almost surely, 2^{90344342213221} is an apocalyptic number.

It is an amenable number.

90344342213221 is a deficient number, since it is larger than the sum of its proper divisors (7378336499).

90344342213221 is a wasteful number, since it uses less digits than its factorization.

90344342213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175943.

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 90344342213221 in words is "ninety trillion, three hundred forty-four billion, three hundred forty-two million, two hundred thirteen thousand, two hundred twenty-one".