1213303123 has 2 divisors, whose sum is σ = 1213303124. Its totient is φ = 1213303122.

The previous prime is 1213303111. The next prime is 1213303129. The reversal of 1213303123 is 3213033121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213303123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213303123.

It is not a weakly prime, because it can be changed into another prime (1213303129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606651561 + 606651562.

It is an arithmetic number, because the mean of its divisors is an integer number (606651562).

Almost surely, 2^1213303123 is an apocalyptic number.

1213303123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213303123 is an equidigital number, since it uses as much as digits as its factorization.

1213303123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1213303123 is about 34832.5009581569. The cubic root of 1213303123 is about 1066.5710018480.

Adding to 1213303123 its reverse (3213033121), we get a palindrome (4426336244).

The spelling of 1213303123 in words is "one billion, two hundred thirteen million, three hundred three thousand, one hundred twenty-three".