1213322212 has 24 divisors (see below), whose sum is σ = 2143282680. Its totient is φ = 600983040.

The previous prime is 1213322207. The next prime is 1213322233. The reversal of 1213322212 is 2122233121.

It can be written as a sum of positive squares in 4 ways, for example, as 258759396 + 954562816 = 16086^2 + 30896^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1213322212.

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, 186714 + ... + 193102.

It is an arithmetic number, because the mean of its divisors is an integer number (89303445).

Almost surely, 2^1213322212 is an apocalyptic number.

It is an amenable number.

1213322212 is a deficient number, since it is larger than the sum of its proper divisors (929960468).

1213322212 is a wasteful number, since it uses less digits than its factorization.

1213322212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831 (or 6829 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 1213322212 is about 34832.7749684116. The cubic root of 1213322212 is about 1066.5765953024.

Adding to 1213322212 its reverse (2122233121), we get a palindrome (3335555333).

The spelling of 1213322212 in words is "one billion, two hundred thirteen million, three hundred twenty-two thousand, two hundred twelve".