21442421331203 has 4 divisors (see below), whose sum is σ = 22181815170240. Its totient is φ = 20703027492168.

The previous prime is 21442421331167. The next prime is 21442421331281. The reversal of 21442421331203 is 30213312424412.

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 21442421331203 - 2¹⁴ = 21442421314819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21442421331203.

It is not an unprimeable number, because it can be changed into a prime (21442421331293) 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, 369696919475 + ... + 369696919532.

It is an arithmetic number, because the mean of its divisors is an integer number (5545453792560).

Almost surely, 2^{21442421331203} is an apocalyptic number.

21442421331203 is a deficient number, since it is larger than the sum of its proper divisors (739393839037).

21442421331203 is an equidigital number, since it uses as much as digits as its factorization.

21442421331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739393839036.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21442421331203 its reverse (30213312424412), we get a palindrome (51655733755615).

The spelling of 21442421331203 in words is "twenty-one trillion, four hundred forty-two billion, four hundred twenty-one million, three hundred thirty-one thousand, two hundred three".