1111222222 has 16 divisors (see below), whose sum is σ = 1857053952. Its totient is φ = 494353720.

The previous prime is 1111222213. The next prime is 1111222223. The reversal of 1111222222 is 2222221111.

It is a happy number.

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

1111222222 is a modest number, since divided by 22222 gives 11112 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 1111222196 and 1111222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111222223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536308 + ... + 538375.

It is an arithmetic number, because the mean of its divisors is an integer number (116065872).

Almost surely, 2^1111222222 is an apocalyptic number.

1111222222 is a deficient number, since it is larger than the sum of its proper divisors (745831730).

1111222222 is a wasteful number, since it uses less digits than its factorization.

1111222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074743.

The product of its digits is 64, while the sum is 16.

The square root of 1111222222 is about 33334.9999550022. Note that the first 4 decimals coincide. The cubic root of 1111222222 is about 1035.7786922371.

Adding to 1111222222 its reverse (2222221111), we get a palindrome (3333443333).

It can be divided in two parts, 1111 and 222222, that multiplied together give a palindrome (246888642).

The spelling of 1111222222 in words is "one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".