1223311 has 2 divisors, whose sum is σ = 1223312. Its totient is φ = 1223310.

The previous prime is 1223309. The next prime is 1223323. The reversal of 1223311 is 1133221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223311 - 2¹ = 1223309 is a prime.

Together with 1223309, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1223291 and 1223300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611655 + 611656.

It is an arithmetic number, because the mean of its divisors is an integer number (611656).

2^1223311 is an apocalyptic number.

1223311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223311 is an equidigital number, since it uses as much as digits as its factorization.

1223311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 13.

The square root of 1223311 is about 1106.0339054477. The cubic root of 1223311 is about 106.9495496873.

Adding to 1223311 its reverse (1133221), we get a palindrome (2356532).

The spelling of 1223311 in words is "one million, two hundred twenty-three thousand, three hundred eleven".