1311112211 has 2 divisors, whose sum is σ = 1311112212. Its totient is φ = 1311112210.

The previous prime is 1311112207. The next prime is 1311112259. The reversal of 1311112211 is 1122111131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311112211 - 2² = 1311112207 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311112261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655556105 + 655556106.

It is an arithmetic number, because the mean of its divisors is an integer number (655556106).

Almost surely, 2^1311112211 is an apocalyptic number.

1311112211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311112211 is an equidigital number, since it uses as much as digits as its factorization.

1311112211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12, while the sum is 14.

The square root of 1311112211 is about 36209.2834919444. The cubic root of 1311112211 is about 1094.4937537395.

Adding to 1311112211 its reverse (1122111131), we get a palindrome (2433223342).

The spelling of 1311112211 in words is "one billion, three hundred eleven million, one hundred twelve thousand, two hundred eleven".