21333323221021 has 8 divisors (see below), whose sum is σ = 24381034614080. Its totient is φ = 18285635275488.

The previous prime is 21333323220973. The next prime is 21333323221033. The reversal of 21333323221021 is 12012232333312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21333323221021 - 2²³ = 21333314832413 is a prime.

It is a super-2 number, since 2×21333323221021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333323221081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3866976 + ... + 7590793.

It is an arithmetic number, because the mean of its divisors is an integer number (3047629326760).

Almost surely, 2^{21333323221021} is an apocalyptic number.

It is an amenable number.

21333323221021 is a deficient number, since it is larger than the sum of its proper divisors (3047711393059).

21333323221021 is a wasteful number, since it uses less digits than its factorization.

21333323221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11723763.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21333323221021 its reverse (12012232333312), we get a palindrome (33345555554333).

The spelling of 21333323221021 in words is "twenty-one trillion, three hundred thirty-three billion, three hundred twenty-three million, two hundred twenty-one thousand, twenty-one".