121210003 has 4 divisors (see below), whose sum is σ = 122870488. Its totient is φ = 119549520.

The previous prime is 121209967. The next prime is 121210007. The reversal of 121210003 is 300012121.

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 121210003 - 2¹⁷ = 121078931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830133 + ... + 830278.

It is an arithmetic number, because the mean of its divisors is an integer number (30717622).

Almost surely, 2^121210003 is an apocalyptic number.

121210003 is a deficient number, since it is larger than the sum of its proper divisors (1660485).

121210003 is an equidigital number, since it uses as much as digits as its factorization.

121210003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660484.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 121210003 is about 11009.5414527581. The cubic root of 121210003 is about 494.8947203234.

Adding to 121210003 its reverse (300012121), we get a palindrome (421222124).

The spelling of 121210003 in words is "one hundred twenty-one million, two hundred ten thousand, three".