123312324221 has 2 divisors, whose sum is σ = 123312324222. Its totient is φ = 123312324220.

The previous prime is 123312324211. The next prime is 123312324257. The reversal of 123312324221 is 122423213321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74917164100 + 48395160121 = 273710^2 + 219989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123312324221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123312324211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61656162110 + 61656162111.

It is an arithmetic number, because the mean of its divisors is an integer number (61656162111).

Almost surely, 2^123312324221 is an apocalyptic number.

It is an amenable number.

123312324221 is a deficient number, since it is larger than the sum of its proper divisors (1).

123312324221 is an equidigital number, since it uses as much as digits as its factorization.

123312324221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

Adding to 123312324221 its reverse (122423213321), we get a palindrome (245735537542).

The spelling of 123312324221 in words is "one hundred twenty-three billion, three hundred twelve million, three hundred twenty-four thousand, two hundred twenty-one".