21330301333 has 4 divisors (see below), whose sum is σ = 23269419648. Its totient is φ = 19391183020.

The previous prime is 21330301313. The next prime is 21330301337. The reversal of 21330301333 is 33310303312.

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 not a de Polignac number, because 21330301333 - 2¹³ = 21330293141 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 (21330301337) 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, 969559141 + ... + 969559162.

It is an arithmetic number, because the mean of its divisors is an integer number (5817354912).

Almost surely, 2^21330301333 is an apocalyptic number.

It is an amenable number.

21330301333 is a deficient number, since it is larger than the sum of its proper divisors (1939118315).

21330301333 is a wasteful number, since it uses less digits than its factorization.

21330301333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939118314.

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 21330301333 its reverse (33310303312), we get a palindrome (54640604645).

The spelling of 21330301333 in words is "twenty-one billion, three hundred thirty million, three hundred one thousand, three hundred thirty-three".