90302120321 has 4 divisors (see below), whose sum is σ = 103202423232. Its totient is φ = 77401817412.

The previous prime is 90302120309. The next prime is 90302120329. The reversal of 90302120321 is 12302120309.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12302120309 = 107 ⋅114973087.

It is a cyclic number.

It is not a de Polignac number, because 90302120321 - 2⁶ = 90302120257 is a prime.

It is a super-2 number, since 2×90302120321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90302120329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450151445 + ... + 6450151458.

It is an arithmetic number, because the mean of its divisors is an integer number (25800605808).

Almost surely, 2^90302120321 is an apocalyptic number.

It is an amenable number.

90302120321 is a deficient number, since it is larger than the sum of its proper divisors (12900302911).

90302120321 is a wasteful number, since it uses less digits than its factorization.

90302120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12900302910.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 90302120321 in words is "ninety billion, three hundred two million, one hundred twenty thousand, three hundred twenty-one".