1243221223 has 2 divisors, whose sum is σ = 1243221224. Its totient is φ = 1243221222.

The previous prime is 1243221197. The next prime is 1243221253. The reversal of 1243221223 is 3221223421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1243221223 - 2¹⁷ = 1243090151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243221194 and 1243221203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243221253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621610611 + 621610612.

It is an arithmetic number, because the mean of its divisors is an integer number (621610612).

Almost surely, 2^1243221223 is an apocalyptic number.

1243221223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243221223 is an equidigital number, since it uses as much as digits as its factorization.

1243221223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

The square root of 1243221223 is about 35259.3423506452. The cubic root of 1243221223 is about 1075.2665567223.

Adding to 1243221223 its reverse (3221223421), we get a palindrome (4464444644).

The spelling of 1243221223 in words is "one billion, two hundred forty-three million, two hundred twenty-one thousand, two hundred twenty-three".