23232121221 has 8 divisors (see below), whose sum is σ = 32322951360. Its totient is φ = 14814685952.

The previous prime is 23232121189. The next prime is 23232121229. The reversal of 23232121221 is 12212123232.

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 23232121221 - 2⁵ = 23232121189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23232121229) 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, 168348636 + ... + 168348773.

It is an arithmetic number, because the mean of its divisors is an integer number (4040368920).

Almost surely, 2^23232121221 is an apocalyptic number.

It is an amenable number.

23232121221 is a deficient number, since it is larger than the sum of its proper divisors (9090830139).

23232121221 is a wasteful number, since it uses less digits than its factorization.

23232121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336697435.

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

Adding to 23232121221 its reverse (12212123232), we get a palindrome (35444244453).

It can be divided in two parts, 23232 and 121221, that added together give a triangular number (144453 = T₅₃₇).

The spelling of 23232121221 in words is "twenty-three billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".