121204113403 has 16 divisors (see below), whose sum is σ = 126858035520. Its totient is φ = 115801637952.

The previous prime is 121204113391. The next prime is 121204113439. The reversal of 121204113403 is 304311402121.

It is not a de Polignac number, because 121204113403 - 2⁹ = 121204112891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121204111403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11589925 + ... + 11600377.

It is an arithmetic number, because the mean of its divisors is an integer number (7928627220).

Almost surely, 2^121204113403 is an apocalyptic number.

121204113403 is a deficient number, since it is larger than the sum of its proper divisors (5653922117).

121204113403 is an frugal number, since it uses more digits than its factorization.

121204113403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11475 (or 11429 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121204113403 its reverse (304311402121), we get a palindrome (425515515524).

The spelling of 121204113403 in words is "one hundred twenty-one billion, two hundred four million, one hundred thirteen thousand, four hundred three".