21022306033 has 4 divisors (see below), whose sum is σ = 21024687348. Its totient is φ = 21019924720.

The previous prime is 21022306013. The next prime is 21022306057. The reversal of 21022306033 is 33060322012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14599405584 + 6422900449 = 120828^2 + 80143^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022306033 - 2⁵ = 21022306001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022305995 and 21022306013.

It is not an unprimeable number, because it can be changed into a prime (21022306013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177366 + ... + 1195087.

It is an arithmetic number, because the mean of its divisors is an integer number (5256171837).

Almost surely, 2^21022306033 is an apocalyptic number.

It is an amenable number.

21022306033 is a deficient number, since it is larger than the sum of its proper divisors (2381315).

21022306033 is an equidigital number, since it uses as much as digits as its factorization.

21022306033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381314.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21022306033 its reverse (33060322012), we get a palindrome (54082628045).

The spelling of 21022306033 in words is "twenty-one billion, twenty-two million, three hundred six thousand, thirty-three".