123340312123111 has 4 divisors (see below), whose sum is σ = 123373037070400. Its totient is φ = 123307587175824.

The previous prime is 123340312123087. The next prime is 123340312123121. The reversal of 123340312123111 is 111321213043321.

It is a happy number.

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 123340312123111 - 2¹¹ = 123340312121063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123340312123111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123340312123121) 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, 16362467991 + ... + 16362475528.

It is an arithmetic number, because the mean of its divisors is an integer number (30843259267600).

Almost surely, 2^{123340312123111} is an apocalyptic number.

123340312123111 is a deficient number, since it is larger than the sum of its proper divisors (32724947289).

123340312123111 is an equidigital number, since it uses as much as digits as its factorization.

123340312123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32724947288.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 123340312123111 its reverse (111321213043321), we get a palindrome (234661525166432).

The spelling of 123340312123111 in words is "one hundred twenty-three trillion, three hundred forty billion, three hundred twelve million, one hundred twenty-three thousand, one hundred eleven".