123303123221 has 2 divisors, whose sum is σ = 123303123222. Its totient is φ = 123303123220.

The previous prime is 123303123217. The next prime is 123303123227. The reversal of 123303123221 is 122321303321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87491724100 + 35811399121 = 295790^2 + 189239^2 .

It is a cyclic number.

It is not a de Polignac number, because 123303123221 - 2² = 123303123217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123303123227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61651561610 + 61651561611.

It is an arithmetic number, because the mean of its divisors is an integer number (61651561611).

Almost surely, 2^123303123221 is an apocalyptic number.

It is an amenable number.

123303123221 is a deficient number, since it is larger than the sum of its proper divisors (1).

123303123221 is an equidigital number, since it uses as much as digits as its factorization.

123303123221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 123303123221 its reverse (122321303321), we get a palindrome (245624426542).

The spelling of 123303123221 in words is "one hundred twenty-three billion, three hundred three million, one hundred twenty-three thousand, two hundred twenty-one".