1111221212 has 12 divisors (see below), whose sum is σ = 1955879016. Its totient is φ = 552398640.

The previous prime is 1111221203. The next prime is 1111221229. The reversal of 1111221212 is 2121221111.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802214 + ... + 803597.

It is an arithmetic number, because the mean of its divisors is an integer number (162989918).

Almost surely, 2^1111221212 is an apocalyptic number.

It is an amenable number.

1111221212 is a deficient number, since it is larger than the sum of its proper divisors (844657804).

1111221212 is a wasteful number, since it uses less digits than its factorization.

1111221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605988 (or 1605986 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 1111221212 is about 33334.9848057562. The cubic root of 1111221212 is about 1035.7783784274.

Adding to 1111221212 its reverse (2121221111), we get a palindrome (3232442323).

The spelling of 1111221212 in words is "one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".