1122221212 has 12 divisors (see below), whose sum is σ = 2244442480. Its totient is φ = 480951936.

The previous prime is 1122221179. The next prime is 1122221237. The reversal of 1122221212 is 2121222211.

It is a happy number.

1122221212 is an admirable number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20039637 + ... + 20039692.

Almost surely, 2^1122221212 is an apocalyptic number.

It is an amenable number.

1122221212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1122221212 is a wasteful number, since it uses less digits than its factorization.

1122221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40079340 (or 40079338 counting only the distinct ones).

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

The square root of 1122221212 is about 33499.5703256027. The cubic root of 1122221212 is about 1039.1848926324.

Adding to 1122221212 its reverse (2121222211), we get a palindrome (3243443423).

Subtracting 1122221212 from its reverse (2121222211), we obtain a palindrome (999000999).

The spelling of 1122221212 in words is "one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".