2121024403 has 4 divisors (see below), whose sum is σ = 2121509880. Its totient is φ = 2120538928.

The previous prime is 2121024401. The next prime is 2121024439. The reversal of 2121024403 is 3044201212.

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 2121024403 - 2¹ = 2121024401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121024401) 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, 236125 + ... + 244942.

It is an arithmetic number, because the mean of its divisors is an integer number (530377470).

Almost surely, 2^2121024403 is an apocalyptic number.

2121024403 is a deficient number, since it is larger than the sum of its proper divisors (485477).

2121024403 is an equidigital number, since it uses as much as digits as its factorization.

2121024403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485476.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2121024403 is about 46054.5806950840. The cubic root of 2121024403 is about 1284.8385395704.

Adding to 2121024403 its reverse (3044201212), we get a palindrome (5165225615).

The spelling of 2121024403 in words is "two billion, one hundred twenty-one million, twenty-four thousand, four hundred three".