123103310132521 has 2 divisors, whose sum is σ = 123103310132522. Its totient is φ = 123103310132520.

The previous prime is 123103310132519. The next prime is 123103310132587. The reversal of 123103310132521 is 125231013301321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78163917553296 + 44939392579225 = 8841036^2 + 6703685^2 .

It is a cyclic number.

It is not a de Polignac number, because 123103310132521 - 2¹ = 123103310132519 is a prime.

Together with 123103310132519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123103310132521.

It is not a weakly prime, because it can be changed into another prime (123103310132591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61551655066260 + 61551655066261.

It is an arithmetic number, because the mean of its divisors is an integer number (61551655066261).

Almost surely, 2^{123103310132521} is an apocalyptic number.

It is an amenable number.

123103310132521 is a deficient number, since it is larger than the sum of its proper divisors (1).

123103310132521 is an equidigital number, since it uses as much as digits as its factorization.

123103310132521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

Adding to 123103310132521 its reverse (125231013301321), we get a palindrome (248334323433842).

The spelling of 123103310132521 in words is "one hundred twenty-three trillion, one hundred three billion, three hundred ten million, one hundred thirty-two thousand, five hundred twenty-one".