23312121222 has 64 divisors (see below), whose sum is σ = 51878002176. Its totient is φ = 6938023680.

The previous prime is 23312121191. The next prime is 23312121229. The reversal of 23312121222 is 22212121332.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23312121229) 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, 311722 + ... + 379202.

It is an arithmetic number, because the mean of its divisors is an integer number (810593784).

Almost surely, 2^23312121222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23312121222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25939001088).

23312121222 is an abundant number, since it is smaller than the sum of its proper divisors (28565880954).

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

23312121222 is a wasteful number, since it uses less digits than its factorization.

23312121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67645.

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

Adding to 23312121222 its reverse (22212121332), we get a palindrome (45524242554).

The spelling of 23312121222 in words is "twenty-three billion, three hundred twelve million, one hundred twenty-one thousand, two hundred twenty-two".