222123011220 has 288 divisors, whose sum is σ = 778924823040. Its totient is φ = 50722560000.

The previous prime is 222123011213. The next prime is 222123011263. The reversal of 222123011220 is 22110321222.

It is a super-2 number, since 2×222123011220² (a number of 23 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 = 222123011193 and 222123011202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2307045 + ... + 2401395.

It is an arithmetic number, because the mean of its divisors is an integer number (2704600080).

Almost surely, 2^222123011220 is an apocalyptic number.

222123011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222123011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389462411520).

222123011220 is an abundant number, since it is smaller than the sum of its proper divisors (556801811820).

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

222123011220 is a wasteful number, since it uses less digits than its factorization.

222123011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94447 (or 94442 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 222123011220 its reverse (22110321222), we get a palindrome (244233332442).

The spelling of 222123011220 in words is "two hundred twenty-two billion, one hundred twenty-three million, eleven thousand, two hundred twenty".