23321111221 has 16 divisors (see below), whose sum is σ = 24472969200. Its totient is φ = 22192869888.

The previous prime is 23321111213. The next prime is 23321111249. The reversal of 23321111221 is 12211112332.

It can be written as a sum of positive squares in 8 ways, for example, as 364619025 + 22956492196 = 19095^2 + 151514^2 .

It is a cyclic number.

It is not a de Polignac number, because 23321111221 - 2³ = 23321111213 is a prime.

It is a super-2 number, since 2×23321111221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321111321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3970675 + ... + 3976543.

It is an arithmetic number, because the mean of its divisors is an integer number (1529560575).

Almost surely, 2^23321111221 is an apocalyptic number.

It is an amenable number.

23321111221 is a deficient number, since it is larger than the sum of its proper divisors (1151857979).

23321111221 is a wasteful number, since it uses less digits than its factorization.

23321111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7848.

The product of its digits is 144, while the sum is 19.

Adding to 23321111221 its reverse (12211112332), we get a palindrome (35532223553).

It can be divided in two parts, 2332111 and 1221, that added together give a palindrome (2333332).

The spelling of 23321111221 in words is "twenty-three billion, three hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".