2121323003 has 4 divisors (see below), whose sum is σ = 2128819128. Its totient is φ = 2113826880.

The previous prime is 2121322997. The next prime is 2121323033. The reversal of 2121323003 is 3003231212.

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 2121323003 - 2⁶ = 2121322939 is a prime.

It is a super-2 number, since 2×2121323003² = 9000022566113876018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121323033) 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, 3747638 + ... + 3748203.

It is an arithmetic number, because the mean of its divisors is an integer number (532204782).

Almost surely, 2^2121323003 is an apocalyptic number.

2121323003 is a deficient number, since it is larger than the sum of its proper divisors (7496125).

2121323003 is an equidigital number, since it uses as much as digits as its factorization.

2121323003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7496124.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2121323003 is about 46057.8223866479. The cubic root of 2121323003 is about 1284.8988303722.

Adding to 2121323003 its reverse (3003231212), we get a palindrome (5124554215).

The spelling of 2121323003 in words is "two billion, one hundred twenty-one million, three hundred twenty-three thousand, three".