121003 has 4 divisors (see below), whose sum is σ = 126288. Its totient is φ = 115720.

The previous prime is 121001. The next prime is 121007. The reversal of 121003 is 300121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121003 - 2¹ = 121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2608 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (31572).

2¹²¹⁰⁰³ is an apocalyptic number.

121003 is a deficient number, since it is larger than the sum of its proper divisors (5285).

121003 is an equidigital number, since it uses as much as digits as its factorization.

121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 121003 is about 347.8548547886. The cubic root of 121003 is about 49.4612831967.

Adding to 121003 its reverse (300121), we get a palindrome (421124).

The spelling of 121003 in words is "one hundred twenty-one thousand, three", and thus it is an iban number.