121204304123 has 12 divisors (see below), whose sum is σ = 141018568632. Its totient is φ = 103870388160.

The previous prime is 121204304113. The next prime is 121204304141. The reversal of 121204304123 is 321403402121.

It is not a de Polignac number, because 121204304123 - 2³⁴ = 104024434939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121204304113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47411 + ... + 494627.

It is an arithmetic number, because the mean of its divisors is an integer number (11751547386).

Almost surely, 2^121204304123 is an apocalyptic number.

121204304123 is a deficient number, since it is larger than the sum of its proper divisors (19814264509).

121204304123 is an equidigital number, since it uses as much as digits as its factorization.

121204304123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452762 (or 452755 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121204304123 its reverse (321403402121), we get a palindrome (442607706244).

The spelling of 121204304123 in words is "one hundred twenty-one billion, two hundred four million, three hundred four thousand, one hundred twenty-three".