23331221001 has 24 divisors (see below), whose sum is σ = 37458023616. Its totient is φ = 13873335840.

The previous prime is 23331220987. The next prime is 23331221003. The reversal of 23331221001 is 10012213332.

It is not a de Polignac number, because 23331221001 - 2⁷ = 23331220873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23331221003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2218045 + ... + 2228538.

It is an arithmetic number, because the mean of its divisors is an integer number (1560750984).

Almost surely, 2^23331221001 is an apocalyptic number.

It is an amenable number.

23331221001 is a deficient number, since it is larger than the sum of its proper divisors (14126802615).

23331221001 is a wasteful number, since it uses less digits than its factorization.

23331221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446653 (or 4446650 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23331221001 its reverse (10012213332), we get a palindrome (33343434333).

The spelling of 23331221001 in words is "twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand, one".