121223123103 has 4 divisors (see below), whose sum is σ = 161630830808. Its totient is φ = 80815415400.

The previous prime is 121223123089. The next prime is 121223123117. The reversal of 121223123103 is 301321322121.

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

It is an interprime number because it is at equal distance from previous prime (121223123089) and next prime (121223123117).

It is not a de Polignac number, because 121223123103 - 2⁹ = 121223122591 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 121223123103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223123123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20203853848 + ... + 20203853853.

It is an arithmetic number, because the mean of its divisors is an integer number (40407707702).

Almost surely, 2^121223123103 is an apocalyptic number.

121223123103 is a deficient number, since it is larger than the sum of its proper divisors (40407707705).

121223123103 is an equidigital number, since it uses as much as digits as its factorization.

121223123103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40407707704.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121223123103 its reverse (301321322121), we get a palindrome (422544445224).

The spelling of 121223123103 in words is "one hundred twenty-one billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred three".