21221211111333 has 8 divisors (see below), whose sum is σ = 28717260807648. Its totient is φ = 13936317744624.

The previous prime is 21221211111311. The next prime is 21221211111343. The reversal of 21221211111333 is 33311111212212.

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

It is not a de Polignac number, because 21221211111333 - 2⁸ = 21221211111077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221211111343) 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, 52789082166 + ... + 52789082567.

It is an arithmetic number, because the mean of its divisors is an integer number (3589657600956).

Almost surely, 2^{21221211111333} is an apocalyptic number.

It is an amenable number.

21221211111333 is a deficient number, since it is larger than the sum of its proper divisors (7496049696315).

21221211111333 is a wasteful number, since it uses less digits than its factorization.

21221211111333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105578164803.

The product of its digits is 432, while the sum is 24.

Adding to 21221211111333 its reverse (33311111212212), we get a palindrome (54532322323545).

The spelling of 21221211111333 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, one hundred eleven thousand, three hundred thirty-three".