12121111012103 has 2 divisors, whose sum is σ = 12121111012104. Its totient is φ = 12121111012102.

The previous prime is 12121111012081. The next prime is 12121111012123. The reversal of 12121111012103 is 30121011112121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121111012103 - 2¹⁸ = 12121110749959 is a prime.

It is a super-2 number, since 2×12121111012103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121111012123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060555506051 + 6060555506052.

It is an arithmetic number, because the mean of its divisors is an integer number (6060555506052).

Almost surely, 2^{12121111012103} is an apocalyptic number.

12121111012103 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121111012103 is an equidigital number, since it uses as much as digits as its factorization.

12121111012103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 12121111012103 its reverse (30121011112121), we get a palindrome (42242122124224).

The spelling of 12121111012103 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, twelve thousand, one hundred three".