812112211 has 2 divisors, whose sum is σ = 812112212. Its totient is φ = 812112210.

The previous prime is 812112187. The next prime is 812112229. The reversal of 812112211 is 112211218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812112211 - 2¹⁹ = 811587923 is a prime.

It is not a weakly prime, because it can be changed into another prime (812112251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406056105 + 406056106.

It is an arithmetic number, because the mean of its divisors is an integer number (406056106).

Almost surely, 2^812112211 is an apocalyptic number.

812112211 is a deficient number, since it is larger than the sum of its proper divisors (1).

812112211 is an equidigital number, since it uses as much as digits as its factorization.

812112211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 19.

The square root of 812112211 is about 28497.5825465951. The cubic root of 812112211 is about 932.9793115525.

Adding to 812112211 its reverse (112211218), we get a palindrome (924323429).

The spelling of 812112211 in words is "eight hundred twelve million, one hundred twelve thousand, two hundred eleven".