1122312222 has 48 divisors (see below), whose sum is σ = 2605795920. Its totient is φ = 347847936.

The previous prime is 1122312203. The next prime is 1122312223. The reversal of 1122312222 is 2222132211.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1122312195 and 1122312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122312223) 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, 3304 + ... + 47492.

It is an arithmetic number, because the mean of its divisors is an integer number (54287415).

Almost surely, 2^1122312222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122312222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302897960).

1122312222 is an abundant number, since it is smaller than the sum of its proper divisors (1483483698).

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

1122312222 is a wasteful number, since it uses less digits than its factorization.

1122312222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44297 (or 44294 counting only the distinct ones).

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

The square root of 1122312222 is about 33500.9286736950. The cubic root of 1122312222 is about 1039.2129838440.

Adding to 1122312222 its reverse (2222132211), we get a palindrome (3344444433).

The spelling of 1122312222 in words is "one billion, one hundred twenty-two million, three hundred twelve thousand, two hundred twenty-two".