1213331211 has 16 divisors (see below), whose sum is σ = 1814023200. Its totient is φ = 801464544.

The previous prime is 1213331159. The next prime is 1213331237. The reversal of 1213331211 is 1121333121.

1213331211 is a `hidden beast` number, since 121 + 3 + 331 + 211 = 666.

It is not a de Polignac number, because 1213331211 - 2¹⁹ = 1212806923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213331311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203196 + ... + 209081.

It is an arithmetic number, because the mean of its divisors is an integer number (113376450).

Almost surely, 2^1213331211 is an apocalyptic number.

1213331211 is a deficient number, since it is larger than the sum of its proper divisors (600691989).

1213331211 is a wasteful number, since it uses less digits than its factorization.

1213331211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412395 (or 412389 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1213331211 is about 34832.9041424915. The cubic root of 1213331211 is about 1066.5792321670.

Adding to 1213331211 its reverse (1121333121), we get a palindrome (2334664332).

The spelling of 1213331211 in words is "one billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred eleven".