93213021221 has 4 divisors (see below), whose sum is σ = 93215193792. Its totient is φ = 93210848652.

The previous prime is 93213021211. The next prime is 93213021233. The reversal of 93213021221 is 12212031239.

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 a de Polignac number, because none of the positive numbers 2^k-93213021221 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 (93213021211) 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, 1020605 + ... + 1108178.

It is an arithmetic number, because the mean of its divisors is an integer number (23303798448).

Almost surely, 2^93213021221 is an apocalyptic number.

It is an amenable number.

93213021221 is a deficient number, since it is larger than the sum of its proper divisors (2172571).

93213021221 is a wasteful number, since it uses less digits than its factorization.

93213021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172570.

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

The spelling of 93213021221 in words is "ninety-three billion, two hundred thirteen million, twenty-one thousand, two hundred twenty-one".