220121003 has 4 divisors (see below), whose sum is σ = 221801448. Its totient is φ = 218440560.

The previous prime is 220120993. The next prime is 220121021. The reversal of 220121003 is 300121022.

It is a happy number.

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 220121003 - 2¹⁰ = 220119979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121093) 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, 840026 + ... + 840287.

It is an arithmetic number, because the mean of its divisors is an integer number (55450362).

Almost surely, 2^220121003 is an apocalyptic number.

220121003 is a deficient number, since it is larger than the sum of its proper divisors (1680445).

220121003 is a wasteful number, since it uses less digits than its factorization.

220121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680444.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 220121003 is about 14836.4754237656. The cubic root of 220121003 is about 603.7917310021.

Adding to 220121003 its reverse (300121022), we get a palindrome (520242025).

The spelling of 220121003 in words is "two hundred twenty million, one hundred twenty-one thousand, three".