123243502221523 has 2 divisors, whose sum is σ = 123243502221524. Its totient is φ = 123243502221522.

The previous prime is 123243502221473. The next prime is 123243502221559. The reversal of 123243502221523 is 325122205342321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123243502221523 - 2¹³ = 123243502213331 is a prime.

It is not a weakly prime, because it can be changed into another prime (123243502221583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621751110761 + 61621751110762.

It is an arithmetic number, because the mean of its divisors is an integer number (61621751110762).

Almost surely, 2^{123243502221523} is an apocalyptic number.

123243502221523 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243502221523 is an equidigital number, since it uses as much as digits as its factorization.

123243502221523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 123243502221523 its reverse (325122205342321), we get a palindrome (448365707563844).

The spelling of 123243502221523 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred two million, two hundred twenty-one thousand, five hundred twenty-three".