123331221263 has 2 divisors, whose sum is σ = 123331221264. Its totient is φ = 123331221262.

The previous prime is 123331221203. The next prime is 123331221311. The reversal of 123331221263 is 362122133321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123331221263 - 2²⁰ = 123330172687 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123331221203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61665610631 + 61665610632.

It is an arithmetic number, because the mean of its divisors is an integer number (61665610632).

Almost surely, 2^123331221263 is an apocalyptic number.

123331221263 is a deficient number, since it is larger than the sum of its proper divisors (1).

123331221263 is an equidigital number, since it uses as much as digits as its factorization.

123331221263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

Adding to 123331221263 its reverse (362122133321), we get a palindrome (485453354584).

The spelling of 123331221263 in words is "one hundred twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand, two hundred sixty-three".