23331221000 has 128 divisors (see below), whose sum is σ = 57615667200. Its totient is φ = 8818675200.

The previous prime is 23331220987. The next prime is 23331221003. The reversal of 23331221000 is 12213332.

It is a self number, because there is not a number n which added to its sum of digits gives 23331221000.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8681657 + ... + 8684343.

It is an arithmetic number, because the mean of its divisors is an integer number (450122400).

Almost surely, 2^23331221000 is an apocalyptic number.

23331221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23331221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28807833600).

23331221000 is an abundant number, since it is smaller than the sum of its proper divisors (34284446200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23331221000 is a wasteful number, since it uses less digits than its factorization.

23331221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3170 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 23331221000 its reverse (12213332), we get a palindrome (23343434332).

The spelling of 23331221000 in words is "twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand".