23201212321 has 12 divisors (see below), whose sum is σ = 27195197040. Its totient is φ = 19734940680.

The previous prime is 23201212283. The next prime is 23201212343. The reversal of 23201212321 is 12321210232.

It is not a de Polignac number, because 23201212321 - 2¹¹ = 23201210273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23201212921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1800811 + ... + 1813648.

It is an arithmetic number, because the mean of its divisors is an integer number (2266266420).

Almost surely, 2^23201212321 is an apocalyptic number.

It is an amenable number.

23201212321 is a deficient number, since it is larger than the sum of its proper divisors (3993984719).

23201212321 is a wasteful number, since it uses less digits than its factorization.

23201212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614604 (or 3614597 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23201212321 its reverse (12321210232), we get a palindrome (35522422553).

The spelling of 23201212321 in words is "twenty-three billion, two hundred one million, two hundred twelve thousand, three hundred twenty-one".