123232403320021 has 2 divisors, whose sum is σ = 123232403320022. Its totient is φ = 123232403320020.

The previous prime is 123232403319959. The next prime is 123232403320121. The reversal of 123232403320021 is 120023304232321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68109351559921 + 55123051760100 = 8252839^2 + 7424490^2 .

It is a cyclic number.

It is not a de Polignac number, because 123232403320021 - 2¹⁷ = 123232403188949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123232403320121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61616201660010 + 61616201660011.

It is an arithmetic number, because the mean of its divisors is an integer number (61616201660011).

Almost surely, 2^{123232403320021} is an apocalyptic number.

It is an amenable number.

123232403320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123232403320021 is an equidigital number, since it uses as much as digits as its factorization.

123232403320021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 123232403320021 its reverse (120023304232321), we get a palindrome (243255707552342).

The spelling of 123232403320021 in words is "one hundred twenty-three trillion, two hundred thirty-two billion, four hundred three million, three hundred twenty thousand, twenty-one".