12121121111103 has 6 divisors (see below), whose sum is σ = 17508286049384. Its totient is φ = 8080747407396.

The previous prime is 12121121111093. The next prime is 12121121111117. The reversal of 12121121111103 is 30111112112121.

It is not a de Polignac number, because 12121121111103 - 2⁹ = 12121121110591 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 (12121121111173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673395617275 + ... + 673395617292.

Almost surely, 2^{12121121111103} is an apocalyptic number.

12121121111103 is a deficient number, since it is larger than the sum of its proper divisors (5387164938281).

12121121111103 is a wasteful number, since it uses less digits than its factorization.

12121121111103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346791234573 (or 1346791234570 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 12121121111103 its reverse (30111112112121), we get a palindrome (42232233223224).

The spelling of 12121121111103 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred three".