22120021232 has 60 divisors (see below), whose sum is σ = 44744198688. Its totient is φ = 10592179200.

The previous prime is 22120021199. The next prime is 22120021243. The reversal of 22120021232 is 23212002122.

It is a self number, because there is not a number n which added to its sum of digits gives 22120021232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1484057 + ... + 1498887.

Almost surely, 2^22120021232 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 22120021232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22372099344).

22120021232 is an abundant number, since it is smaller than the sum of its proper divisors (22624177456).

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

22120021232 is a wasteful number, since it uses less digits than its factorization.

22120021232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14998 (or 14961 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22120021232 its reverse (23212002122), we get a palindrome (45332023354).

The spelling of 22120021232 in words is "twenty-two billion, one hundred twenty million, twenty-one thousand, two hundred thirty-two".