121003103 has 4 divisors (see below), whose sum is σ = 130311048. Its totient is φ = 111695160.

The previous prime is 121003079. The next prime is 121003111. The reversal of 121003103 is 301300121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301300121 = 163 ⋅1848467.

It is a cyclic number.

It is not a de Polignac number, because 121003103 - 2²² = 116808799 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 (121003123) 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 3 ways as a sum of consecutive naturals, for example, 4653953 + ... + 4653978.

It is an arithmetic number, because the mean of its divisors is an integer number (32577762).

Almost surely, 2^121003103 is an apocalyptic number.

121003103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121003103 is a deficient number, since it is larger than the sum of its proper divisors (9307945).

121003103 is an equidigital number, since it uses as much as digits as its factorization.

121003103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9307944.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 121003103 is about 11000.1410445503. The cubic root of 121003103 is about 494.6129723078.

Adding to 121003103 its reverse (301300121), we get a palindrome (422303224).

The spelling of 121003103 in words is "one hundred twenty-one million, three thousand, one hundred three".