123223533298721 has 2 divisors, whose sum is σ = 123223533298722. Its totient is φ = 123223533298720.

The previous prime is 123223533298717. The next prime is 123223533298807. The reversal of 123223533298721 is 127892335322321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121713055428496 + 1510477870225 = 11032364^2 + 1229015^2 .

It is a cyclic number.

It is not a de Polignac number, because 123223533298721 - 2² = 123223533298717 is a prime.

It is not a weakly prime, because it can be changed into another prime (123223533298321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61611766649360 + 61611766649361.

It is an arithmetic number, because the mean of its divisors is an integer number (61611766649361).

Almost surely, 2^{123223533298721} is an apocalyptic number.

It is an amenable number.

123223533298721 is a deficient number, since it is larger than the sum of its proper divisors (1).

123223533298721 is an equidigital number, since it uses as much as digits as its factorization.

123223533298721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 53.

The spelling of 123223533298721 in words is "one hundred twenty-three trillion, two hundred twenty-three billion, five hundred thirty-three million, two hundred ninety-eight thousand, seven hundred twenty-one".