1211343212 has 12 divisors (see below), whose sum is σ = 2149708176. Its totient is φ = 597140880.

The previous prime is 1211343209. The next prime is 1211343223. The reversal of 1211343212 is 2123431121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132363 + ... + 2132930.

It is an arithmetic number, because the mean of its divisors is an integer number (179142348).

Almost surely, 2^1211343212 is an apocalyptic number.

It is an amenable number.

1211343212 is a deficient number, since it is larger than the sum of its proper divisors (938364964).

1211343212 is a wasteful number, since it uses less digits than its factorization.

1211343212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265368 (or 4265366 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1211343212 is about 34804.3562215996. The cubic root of 1211343212 is about 1065.9963966569.

Adding to 1211343212 its reverse (2123431121), we get a palindrome (3334774333).

The spelling of 1211343212 in words is "one billion, two hundred eleven million, three hundred forty-three thousand, two hundred twelve".