22011223312 has 80 divisors (see below), whose sum is σ = 46309536000. Its totient is φ = 10074811392.

The previous prime is 22011223301. The next prime is 22011223349. The reversal of 22011223312 is 21332211022.

It is a super-3 number, since 3×22011223312³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22011223312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21184489 + ... + 21185527.

It is an arithmetic number, because the mean of its divisors is an integer number (578869200).

Almost surely, 2^22011223312 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 22011223312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23154768000).

22011223312 is an abundant number, since it is smaller than the sum of its proper divisors (24298312688).

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

22011223312 is a wasteful number, since it uses less digits than its factorization.

22011223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808 (or 1802 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22011223312 its reverse (21332211022), we get a palindrome (43343434334).

The spelling of 22011223312 in words is "twenty-two billion, eleven million, two hundred twenty-three thousand, three hundred twelve".