1223131223 has 2 divisors, whose sum is σ = 1223131224. Its totient is φ = 1223131222.

The previous prime is 1223131171. The next prime is 1223131277. The reversal of 1223131223 is 3221313221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223131223 - 2⁶ = 1223131159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223131195 and 1223131204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223131423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611565611 + 611565612.

It is an arithmetic number, because the mean of its divisors is an integer number (611565612).

Almost surely, 2^1223131223 is an apocalyptic number.

1223131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223131223 is an equidigital number, since it uses as much as digits as its factorization.

1223131223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 1223131223 is about 34973.2929962279. The cubic root of 1223131223 is about 1069.4431035152.

Adding to 1223131223 its reverse (3221313221), we get a palindrome (4444444444).

The spelling of 1223131223 in words is "one billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-three".