12220023222 has 96 divisors (see below), whose sum is σ = 29136167424. Its totient is φ = 3670833600.

The previous prime is 12220023217. The next prime is 12220023259. The reversal of 12220023222 is 22232002221.

It is a super-2 number, since 2×12220023222² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 12220023195 and 12220023204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15332128 + ... + 15332924.

It is an arithmetic number, because the mean of its divisors is an integer number (303501744).

Almost surely, 2^12220023222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220023222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14568083712).

12220023222 is an abundant number, since it is smaller than the sum of its proper divisors (16916144202).

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

12220023222 is a wasteful number, since it uses less digits than its factorization.

12220023222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1391 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 12220023222 its reverse (22232002221), we get a palindrome (34452025443).

The spelling of 12220023222 in words is "twelve billion, two hundred twenty million, twenty-three thousand, two hundred twenty-two".