21220221301333 has 2 divisors, whose sum is σ = 21220221301334. Its totient is φ = 21220221301332.

The previous prime is 21220221301259. The next prime is 21220221301381. The reversal of 21220221301333 is 33310312202212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21136978665009 + 83242636324 = 4597497^2 + 288518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220221301333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220221301298 and 21220221301307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220221307333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610110650666 + 10610110650667.

It is an arithmetic number, because the mean of its divisors is an integer number (10610110650667).

Almost surely, 2^{21220221301333} is an apocalyptic number.

It is an amenable number.

21220221301333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220221301333 is an equidigital number, since it uses as much as digits as its factorization.

21220221301333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21220221301333 its reverse (33310312202212), we get a palindrome (54530533503545).

The spelling of 21220221301333 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, three hundred one thousand, three hundred thirty-three".