1211333212 has 12 divisors (see below), whose sum is σ = 2120975640. Its totient is φ = 605340176.

The previous prime is 1211333191. The next prime is 1211333213. The reversal of 1211333212 is 2123331121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211333212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211333213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73162 + ... + 88177.

It is an arithmetic number, because the mean of its divisors is an integer number (176747970).

Almost surely, 2^1211333212 is an apocalyptic number.

It is an amenable number.

1211333212 is a deficient number, since it is larger than the sum of its proper divisors (909642428).

1211333212 is a wasteful number, since it uses less digits than its factorization.

1211333212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163220 (or 163218 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1211333212 is about 34804.2125611254. The cubic root of 1211333212 is about 1065.9934632760.

Adding to 1211333212 its reverse (2123331121), we get a palindrome (3334664333).

The spelling of 1211333212 in words is "one billion, two hundred eleven million, three hundred thirty-three thousand, two hundred twelve".