21000221201333 has 32 divisors (see below), whose sum is σ = 23316104640000. Its totient is φ = 18754759595520.

The previous prime is 21000221201251. The next prime is 21000221201357. The reversal of 21000221201333 is 33310212200012.

It is a cyclic number.

It is not a de Polignac number, because 21000221201333 - 2²⁸ = 20999952765877 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 (21000221201383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170603993 + ... + 170727041.

It is an arithmetic number, because the mean of its divisors is an integer number (728628270000).

Almost surely, 2^{21000221201333} is an apocalyptic number.

It is an amenable number.

21000221201333 is a deficient number, since it is larger than the sum of its proper divisors (2315883438667).

21000221201333 is a wasteful number, since it uses less digits than its factorization.

21000221201333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124125.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21000221201333 its reverse (33310212200012), we get a palindrome (54310433401345).

The spelling of 21000221201333 in words is "twenty-one trillion, two hundred twenty-one million, two hundred one thousand, three hundred thirty-three".