23221021211 has 4 divisors (see below), whose sum is σ = 23787387624. Its totient is φ = 22654654800.

The previous prime is 23221021189. The next prime is 23221021267. The reversal of 23221021211 is 11212012232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23221021211 - 2²⁶ = 23153912347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23221021211.

It is not an unprimeable number, because it can be changed into a prime (23221021711) 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, 283183145 + ... + 283183226.

It is an arithmetic number, because the mean of its divisors is an integer number (5946846906).

Almost surely, 2^23221021211 is an apocalyptic number.

23221021211 is a deficient number, since it is larger than the sum of its proper divisors (566366413).

23221021211 is an equidigital number, since it uses as much as digits as its factorization.

23221021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566366412.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 23221021211 its reverse (11212012232), we get a palindrome (34433033443).

The spelling of 23221021211 in words is "twenty-three billion, two hundred twenty-one million, twenty-one thousand, two hundred eleven".