23223020221 has 4 divisors (see below), whose sum is σ = 24589080252. Its totient is φ = 21856960192.

The previous prime is 23223020131. The next prime is 23223020251. The reversal of 23223020221 is 12202032232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14552803225 + 8670216996 = 120635^2 + 93114^2 .

It is a cyclic number.

It is not a de Polignac number, because 23223020221 - 2¹⁵ = 23222987453 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 (23223020251) 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, 683029990 + ... + 683030023.

It is an arithmetic number, because the mean of its divisors is an integer number (6147270063).

Almost surely, 2^23223020221 is an apocalyptic number.

It is an amenable number.

23223020221 is a deficient number, since it is larger than the sum of its proper divisors (1366060031).

23223020221 is a wasteful number, since it uses less digits than its factorization.

23223020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366060030.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 23223020221 its reverse (12202032232), we get a palindrome (35425052453).

The spelling of 23223020221 in words is "twenty-three billion, two hundred twenty-three million, twenty thousand, two hundred twenty-one".