22231203012 has 72 divisors (see below), whose sum is σ = 58933929600. Its totient is φ = 7052538240.

The previous prime is 22231202953. The next prime is 22231203017. The reversal of 22231203012 is 21030213222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22231203017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97312 + ... + 232232.

It is an arithmetic number, because the mean of its divisors is an integer number (818526800).

Almost surely, 2^22231203012 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 22231203012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29466964800).

22231203012 is an abundant number, since it is smaller than the sum of its proper divisors (36702726588).

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

22231203012 is a wasteful number, since it uses less digits than its factorization.

22231203012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135153 (or 135148 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22231203012 its reverse (21030213222), we get a palindrome (43261416234).

The spelling of 22231203012 in words is "twenty-two billion, two hundred thirty-one million, two hundred three thousand, twelve".