21223301441 has 4 divisors (see below), whose sum is σ = 21479003952. Its totient is φ = 20967598932.

The previous prime is 21223301413. The next prime is 21223301537. The reversal of 21223301441 is 14410332212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21223301441 - 2³⁴ = 4043432257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21223301641) 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, 127851131 + ... + 127851296.

It is an arithmetic number, because the mean of its divisors is an integer number (5369750988).

Almost surely, 2^21223301441 is an apocalyptic number.

It is an amenable number.

21223301441 is a deficient number, since it is larger than the sum of its proper divisors (255702511).

21223301441 is an equidigital number, since it uses as much as digits as its factorization.

21223301441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255702510.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21223301441 its reverse (14410332212), we get a palindrome (35633633653).

The spelling of 21223301441 in words is "twenty-one billion, two hundred twenty-three million, three hundred one thousand, four hundred forty-one".