121104320123 has 4 divisors (see below), whose sum is σ = 121122154728. Its totient is φ = 121086485520.

The previous prime is 121104320119. The next prime is 121104320137. The reversal of 121104320123 is 321023401121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321023401121 = 5801 ⋅55339321.

It is a cyclic number.

It is not a de Polignac number, because 121104320123 - 2² = 121104320119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121104320095 and 121104320104.

It is not an unprimeable number, because it can be changed into a prime (121104320173) 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, 8907113 + ... + 8920698.

It is an arithmetic number, because the mean of its divisors is an integer number (30280538682).

Almost surely, 2^121104320123 is an apocalyptic number.

121104320123 is a deficient number, since it is larger than the sum of its proper divisors (17834605).

121104320123 is an equidigital number, since it uses as much as digits as its factorization.

121104320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17834604.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121104320123 its reverse (321023401121), we get a palindrome (442127721244).

The spelling of 121104320123 in words is "one hundred twenty-one billion, one hundred four million, three hundred twenty thousand, one hundred twenty-three".