123203121211103 has 4 divisors (see below), whose sum is σ = 128559778655088. Its totient is φ = 117846463767120.

The previous prime is 123203121211067. The next prime is 123203121211109. The reversal of 123203121211103 is 301112121302321.

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 123203121211103 - 2¹⁶ = 123203121145567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 5356657443961 = 123203121211103 / (1 + 2 + 3 + 2 + 0 + 3 + 1 + 2 + 1 + 2 + 1 + 1 + 1 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123203121211109) 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, 2678328721958 + ... + 2678328722003.

It is an arithmetic number, because the mean of its divisors is an integer number (32139944663772).

Almost surely, 2^{123203121211103} is an apocalyptic number.

123203121211103 is a deficient number, since it is larger than the sum of its proper divisors (5356657443985).

123203121211103 is an equidigital number, since it uses as much as digits as its factorization.

123203121211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356657443984.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 123203121211103 its reverse (301112121302321), we get a palindrome (424315242513424).

The spelling of 123203121211103 in words is "one hundred twenty-three trillion, two hundred three billion, one hundred twenty-one million, two hundred eleven thousand, one hundred three".