121204400103 has 6 divisors (see below), whose sum is σ = 175073022384. Its totient is φ = 80802933396.

The previous prime is 121204400087. The next prime is 121204400123. The reversal of 121204400103 is 301004402121.

121204400103 is a `hidden beast` number, since 1 + 2 + 120 + 440 + 0 + 103 = 666.

It is not a de Polignac number, because 121204400103 - 2⁴ = 121204400087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121204400123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6733577775 + ... + 6733577792.

It is an arithmetic number, because the mean of its divisors is an integer number (29178837064).

Almost surely, 2^121204400103 is an apocalyptic number.

121204400103 is a deficient number, since it is larger than the sum of its proper divisors (53868622281).

121204400103 is a wasteful number, since it uses less digits than its factorization.

121204400103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13467155573 (or 13467155570 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121204400103 its reverse (301004402121), we get a palindrome (422208802224).

The spelling of 121204400103 in words is "one hundred twenty-one billion, two hundred four million, four hundred thousand, one hundred three".