1121212222 has 16 divisors (see below), whose sum is σ = 1819781712. Its totient is φ = 515027520.

The previous prime is 1121212219. The next prime is 1121212241. The reversal of 1121212222 is 2222121211.

It is a happy number.

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 = 1121212196 and 1121212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96703 + ... + 107674.

It is an arithmetic number, because the mean of its divisors is an integer number (113736357).

Almost surely, 2^1121212222 is an apocalyptic number.

1121212222 is a deficient number, since it is larger than the sum of its proper divisors (698569490).

1121212222 is a wasteful number, since it uses less digits than its factorization.

1121212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204603.

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

The square root of 1121212222 is about 33484.5071936261. The cubic root of 1121212222 is about 1038.8733552532.

Adding to 1121212222 its reverse (2222121211), we get a palindrome (3343333433).

The spelling of 1121212222 in words is "one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".