21221044441333 has 24 divisors (see below), whose sum is σ = 23348288426400. Its totient is φ = 19273111149600.

The previous prime is 21221044441273. The next prime is 21221044441351. The reversal of 21221044441333 is 33314444012212.

It is a de Polignac number, because none of the positive numbers 2^k-21221044441333 is a prime.

It is a super-3 number, since 3×21221044441333³ (a number of 41 digits) contains 333 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 (21221044447333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 631806366 + ... + 631839952.

It is an arithmetic number, because the mean of its divisors is an integer number (972845351100).

Almost surely, 2^{21221044441333} is an apocalyptic number.

It is an amenable number.

21221044441333 is a deficient number, since it is larger than the sum of its proper divisors (2127243985067).

21221044441333 is a wasteful number, since it uses less digits than its factorization.

21221044441333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38529 (or 38518 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 21221044441333 its reverse (33314444012212), we get a palindrome (54535488453545).

The spelling of 21221044441333 in words is "twenty-one trillion, two hundred twenty-one billion, forty-four million, four hundred forty-one thousand, three hundred thirty-three".