23221331221 has 8 divisors (see below), whose sum is σ = 25747646688. Its totient is φ = 20764230000.

The previous prime is 23221331183. The next prime is 23221331249. The reversal of 23221331221 is 12213312232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23221331221 - 2¹³ = 23221323029 is a prime.

It is a super-4 number, since 4×23221331221⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23221331192 and 23221331201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221331281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17302855 + ... + 17304196.

It is an arithmetic number, because the mean of its divisors is an integer number (3218455836).

Almost surely, 2^23221331221 is an apocalyptic number.

It is an amenable number.

23221331221 is a deficient number, since it is larger than the sum of its proper divisors (2526315467).

23221331221 is a wasteful number, since it uses less digits than its factorization.

23221331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34607123.

The product of its digits is 864, while the sum is 22.

Adding to 23221331221 its reverse (12213312232), we get a palindrome (35434643453).

It can be divided in two parts, 2 and 3221331221, that added together give a palindrome (3221331223).

The spelling of 23221331221 in words is "twenty-three billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-one".