1111122222 has 64 divisors (see below), whose sum is σ = 2612348928. Its totient is φ = 308448000.

The previous prime is 1111122179. The next prime is 1111122283. The reversal of 1111122222 is 2222211111.

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

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465472 + ... + 467852.

It is an arithmetic number, because the mean of its divisors is an integer number (40817952).

Almost surely, 2^1111122222 is an apocalyptic number.

It is a pronic number, being equal to 33333×33334.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111122222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306174464).

1111122222 is an abundant number, since it is smaller than the sum of its proper divisors (1501226706).

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

1111122222 is a wasteful number, since it uses less digits than its factorization.

1111122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705.

The product of its digits is 32, while the sum is 15.

The square root of 1111122222 is about 33333.4999962500. The cubic root of 1111122222 is about 1035.7476210513.

Adding to 1111122222 its reverse (2222211111), we get a palindrome (3333333333).

Subtracting 1111122222 from its reverse (2222211111), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 11111 and 22222, that added together give a palindrome (33333).

The spelling of 1111122222 in words is "one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twenty-two".