23211223221 has 8 divisors (see below), whose sum is σ = 30967538560. Its totient is φ = 15464528352.

The previous prime is 23211223201. The next prime is 23211223249. The reversal of 23211223221 is 12232211232.

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

It is not a de Polignac number, because 23211223221 - 2⁶ = 23211223157 is a prime.

It is a super-2 number, since 2×23211223221² (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 (23211223201) 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, 2399485 + ... + 2409138.

It is an arithmetic number, because the mean of its divisors is an integer number (3870942320).

Almost surely, 2^23211223221 is an apocalyptic number.

It is an amenable number.

23211223221 is a deficient number, since it is larger than the sum of its proper divisors (7756315339).

23211223221 is a wasteful number, since it uses less digits than its factorization.

23211223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810235.

The product of its digits is 576, while the sum is 21.

Adding to 23211223221 its reverse (12232211232), we get a palindrome (35443434453).

The spelling of 23211223221 in words is "twenty-three billion, two hundred eleven million, two hundred twenty-three thousand, two hundred twenty-one".