121204220103 has 16 divisors (see below), whose sum is σ = 181305130240. Its totient is φ = 80018318232.

The previous prime is 121204220057. The next prime is 121204220107. The reversal of 121204220103 is 301022402121.

It is a happy number.

121204220103 is a `hidden beast` number, since 121 + 20 + 422 + 0 + 103 = 666.

It is not a de Polignac number, because 121204220103 - 2¹³ = 121204211911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121204220107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21788701 + ... + 21794262.

It is an arithmetic number, because the mean of its divisors is an integer number (11331570640).

Almost surely, 2^121204220103 is an apocalyptic number.

121204220103 is a deficient number, since it is larger than the sum of its proper divisors (60100910137).

121204220103 is a wasteful number, since it uses less digits than its factorization.

121204220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43583075 (or 43583069 counting only the distinct ones).

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

Adding to 121204220103 its reverse (301022402121), we get a palindrome (422226622224).

The spelling of 121204220103 in words is "one hundred twenty-one billion, two hundred four million, two hundred twenty thousand, one hundred three".