12811223 has 2 divisors, whose sum is σ = 12811224. Its totient is φ = 12811222.

The previous prime is 12811189. The next prime is 12811231. The reversal of 12811223 is 32211821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12811223 - 2¹² = 12807127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12811195 and 12811204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12811423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405611 + 6405612.

It is an arithmetic number, because the mean of its divisors is an integer number (6405612).

Almost surely, 2^12811223 is an apocalyptic number.

12811223 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811223 is an equidigital number, since it uses as much as digits as its factorization.

12811223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

The square root of 12811223 is about 3579.2768822766. The cubic root of 12811223 is about 233.9897662751.

The spelling of 12811223 in words is "twelve million, eight hundred eleven thousand, two hundred twenty-three".