23915221122 has 64 divisors (see below), whose sum is σ = 52388743680. Its totient is φ = 7233767424.

The previous prime is 23915221097. The next prime is 23915221123. The reversal of 23915221122 is 22112251932.

It is a self number, because there is not a number n which added to its sum of digits gives 23915221122.

It is not an unprimeable number, because it can be changed into a prime (23915221123) 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, 1427418 + ... + 1444074.

It is an arithmetic number, because the mean of its divisors is an integer number (818574120).

Almost surely, 2^23915221122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23915221122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26194371840).

23915221122 is an abundant number, since it is smaller than the sum of its proper divisors (28473522558).

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

23915221122 is a wasteful number, since it uses less digits than its factorization.

23915221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16987.

The product of its digits is 4320, while the sum is 30.

The spelling of 23915221122 in words is "twenty-three billion, nine hundred fifteen million, two hundred twenty-one thousand, one hundred twenty-two".