21221120330303 has 4 divisors (see below), whose sum is σ = 21285232476648. Its totient is φ = 21157008183960.

The previous prime is 21221120330287. The next prime is 21221120330339. The reversal of 21221120330303 is 30303302112212.

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 21221120330303 - 2⁴ = 21221120330287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221120330903) 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, 32056072676 + ... + 32056073337.

It is an arithmetic number, because the mean of its divisors is an integer number (5321308119162).

Almost surely, 2^{21221120330303} is an apocalyptic number.

21221120330303 is a deficient number, since it is larger than the sum of its proper divisors (64112146345).

21221120330303 is an equidigital number, since it uses as much as digits as its factorization.

21221120330303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64112146344.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21221120330303 its reverse (30303302112212), we get a palindrome (51524422442515).

The spelling of 21221120330303 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, three hundred thirty thousand, three hundred three".