21021003221333 has 4 divisors (see below), whose sum is σ = 21509863761408. Its totient is φ = 20532142681260.

The previous prime is 21021003221311. The next prime is 21021003221389. The reversal of 21021003221333 is 33312230012012.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021003221333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021003221299 and 21021003221308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021003221633) 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, 244430269973 + ... + 244430270058.

It is an arithmetic number, because the mean of its divisors is an integer number (5377465940352).

Almost surely, 2^{21021003221333} is an apocalyptic number.

It is an amenable number.

21021003221333 is a deficient number, since it is larger than the sum of its proper divisors (488860540075).

21021003221333 is an equidigital number, since it uses as much as digits as its factorization.

21021003221333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488860540074.

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

Adding to 21021003221333 its reverse (33312230012012), we get a palindrome (54333233233345).

The spelling of 21021003221333 in words is "twenty-one trillion, twenty-one billion, three million, two hundred twenty-one thousand, three hundred thirty-three".