21222554542333 has 2 divisors, whose sum is σ = 21222554542334. Its totient is φ = 21222554542332.

The previous prime is 21222554542331. The next prime is 21222554542339. The reversal of 21222554542333 is 33324545522212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19278097206489 + 1944457335844 = 4390683^2 + 1394438^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222554542333 - 2¹ = 21222554542331 is a prime.

Together with 21222554542331, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21222554542333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222554542331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611277271166 + 10611277271167.

It is an arithmetic number, because the mean of its divisors is an integer number (10611277271167).

Almost surely, 2^{21222554542333} is an apocalyptic number.

It is an amenable number.

21222554542333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222554542333 is an equidigital number, since it uses as much as digits as its factorization.

21222554542333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728000, while the sum is 43.

The spelling of 21222554542333 in words is "twenty-one trillion, two hundred twenty-two billion, five hundred fifty-four million, five hundred forty-two thousand, three hundred thirty-three".