123142342321 has 2 divisors, whose sum is σ = 123142342322. Its totient is φ = 123142342320.

The previous prime is 123142342319. The next prime is 123142342439. The reversal of 123142342321 is 123243241321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62419525921 + 60722816400 = 249839^2 + 246420^2 .

It is a cyclic number.

It is not a de Polignac number, because 123142342321 - 2¹ = 123142342319 is a prime.

Together with 123142342319, 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 123142342321.

It is not a weakly prime, because it can be changed into another prime (123142342021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61571171160 + 61571171161.

It is an arithmetic number, because the mean of its divisors is an integer number (61571171161).

Almost surely, 2^123142342321 is an apocalyptic number.

It is an amenable number.

123142342321 is a deficient number, since it is larger than the sum of its proper divisors (1).

123142342321 is an equidigital number, since it uses as much as digits as its factorization.

123142342321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 28.

Adding to 123142342321 its reverse (123243241321), we get a palindrome (246385583642).

The spelling of 123142342321 in words is "one hundred twenty-three billion, one hundred forty-two million, three hundred forty-two thousand, three hundred twenty-one".