21233122323112 has 128 divisors (see below), whose sum is σ = 48341985120000. Its totient is φ = 8540403941376.

The previous prime is 21233122323107. The next prime is 21233122323139. The reversal of 21233122323112 is 21132322133212.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 889408008 + ... + 889431880.

It is an arithmetic number, because the mean of its divisors is an integer number (377671758750).

Almost surely, 2^{21233122323112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233122323112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24170992560000).

21233122323112 is an abundant number, since it is smaller than the sum of its proper divisors (27108862796888).

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

21233122323112 is a wasteful number, since it uses less digits than its factorization.

21233122323112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31683 (or 31679 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

Adding to 21233122323112 its reverse (21132322133212), we get a palindrome (42365444456324).

The spelling of 21233122323112 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred twenty-two million, three hundred twenty-three thousand, one hundred twelve".