1131212222 has 32 divisors (see below), whose sum is σ = 2055049920. Its totient is φ = 456664320.

The previous prime is 1131212191. The next prime is 1131212237. The reversal of 1131212222 is 2222121311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131212222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17333 + ... + 50624.

It is an arithmetic number, because the mean of its divisors is an integer number (64220310).

Almost surely, 2^1131212222 is an apocalyptic number.

1131212222 is a deficient number, since it is larger than the sum of its proper divisors (923837698).

1131212222 is a wasteful number, since it uses less digits than its factorization.

1131212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68036.

The product of its digits is 96, while the sum is 17.

The square root of 1131212222 is about 33633.4985096704. The cubic root of 1131212222 is about 1041.9527604600.

Adding to 1131212222 its reverse (2222121311), we get a palindrome (3353333533).

The spelling of 1131212222 in words is "one billion, one hundred thirty-one million, two hundred twelve thousand, two hundred twenty-two".