123321203311021 has 2 divisors, whose sum is σ = 123321203311022. Its totient is φ = 123321203311020.

The previous prime is 123321203311013. The next prime is 123321203311043. The reversal of 123321203311021 is 120113302123321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119862864276100 + 3458339034921 = 10948190^2 + 1859661^2 .

It is a cyclic number.

It is not a de Polignac number, because 123321203311021 - 2³ = 123321203311013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123321203311091) 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, 61660601655510 + 61660601655511.

It is an arithmetic number, because the mean of its divisors is an integer number (61660601655511).

Almost surely, 2^{123321203311021} is an apocalyptic number.

It is an amenable number.

123321203311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

123321203311021 is an equidigital number, since it uses as much as digits as its factorization.

123321203311021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 123321203311021 its reverse (120113302123321), we get a palindrome (243434505434342).

The spelling of 123321203311021 in words is "one hundred twenty-three trillion, three hundred twenty-one billion, two hundred three million, three hundred eleven thousand, twenty-one".