23031121110 has 128 divisors (see below), whose sum is σ = 60824494080. Its totient is φ = 5555214336.

The previous prime is 23031121097. The next prime is 23031121193. The reversal of 23031121110 is 1112113032.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23031121110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3294679 + ... + 3301661.

It is an arithmetic number, because the mean of its divisors is an integer number (475191360).

Almost surely, 2^23031121110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23031121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30412247040).

23031121110 is an abundant number, since it is smaller than the sum of its proper divisors (37793372970).

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

23031121110 is a wasteful number, since it uses less digits than its factorization.

23031121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7262.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 23031121110 its reverse (1112113032), we get a palindrome (24143234142).

The spelling of 23031121110 in words is "twenty-three billion, thirty-one million, one hundred twenty-one thousand, one hundred ten".