23221212321 has 16 divisors (see below), whose sum is σ = 33180960384. Its totient is φ = 14407519104.

The previous prime is 23221212319. The next prime is 23221212347. The reversal of 23221212321 is 12321212232.

It is not a de Polignac number, because 23221212321 - 2¹ = 23221212319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23221213321) 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, 4545276 + ... + 4550381.

It is an arithmetic number, because the mean of its divisors is an integer number (2073810024).

Almost surely, 2^23221212321 is an apocalyptic number.

It is an amenable number.

23221212321 is a deficient number, since it is larger than the sum of its proper divisors (9959748063).

23221212321 is a wasteful number, since it uses less digits than its factorization.

23221212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9095720.

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

Adding to 23221212321 its reverse (12321212232), we get a palindrome (35542424553).

The spelling of 23221212321 in words is "twenty-three billion, two hundred twenty-one million, two hundred twelve thousand, three hundred twenty-one".