1312211 has 2 divisors, whose sum is σ = 1312212. Its totient is φ = 1312210.

The previous prime is 1312189. The next prime is 1312229. The reversal of 1312211 is 1122131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1122131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312192 and 1312201.

It is not a weakly prime, because it can be changed into another prime (1312411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656105 + 656106.

It is an arithmetic number, because the mean of its divisors is an integer number (656106).

2^1312211 is an apocalyptic number.

1312211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312211 is an equidigital number, since it uses as much as digits as its factorization.

1312211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 11.

The square root of 1312211 is about 1145.5177868545. The cubic root of 1312211 is about 109.4799418373.

Adding to 1312211 its reverse (1122131), we get a palindrome (2434342).

The spelling of 1312211 in words is "one million, three hundred twelve thousand, two hundred eleven".