123042240313 has 2 divisors, whose sum is σ = 123042240314. Its totient is φ = 123042240312.

The previous prime is 123042240311. The next prime is 123042240341. The reversal of 123042240313 is 313042240321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120983621929 + 2058618384 = 347827^2 + 45372^2 .

It is a cyclic number.

It is not a de Polignac number, because 123042240313 - 2¹ = 123042240311 is a prime.

Together with 123042240311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123042240311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61521120156 + 61521120157.

It is an arithmetic number, because the mean of its divisors is an integer number (61521120157).

Almost surely, 2^123042240313 is an apocalyptic number.

It is an amenable number.

123042240313 is a deficient number, since it is larger than the sum of its proper divisors (1).

123042240313 is an equidigital number, since it uses as much as digits as its factorization.

123042240313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 123042240313 its reverse (313042240321), we get a palindrome (436084480634).

The spelling of 123042240313 in words is "one hundred twenty-three billion, forty-two million, two hundred forty thousand, three hundred thirteen".