123405330342431 has 4 divisors (see below), whose sum is σ = 123415017562200. Its totient is φ = 123395643122664.

The previous prime is 123405330342367. The next prime is 123405330342443. The reversal of 123405330342431 is 134243033504321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123405330342431 - 2⁶ = 123405330342367 is a prime.

It is a super-2 number, since 2×123405330342431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123405330342461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4843590776 + ... + 4843616253.

It is an arithmetic number, because the mean of its divisors is an integer number (30853754390550).

Almost surely, 2^{123405330342431} is an apocalyptic number.

123405330342431 is a deficient number, since it is larger than the sum of its proper divisors (9687219769).

123405330342431 is an equidigital number, since it uses as much as digits as its factorization.

123405330342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9687219768.

The product of its (nonzero) digits is 311040, while the sum is 38.

Adding to 123405330342431 its reverse (134243033504321), we get a palindrome (257648363846752).

The spelling of 123405330342431 in words is "one hundred twenty-three trillion, four hundred five billion, three hundred thirty million, three hundred forty-two thousand, four hundred thirty-one".