21031222225333 has 2 divisors, whose sum is σ = 21031222225334. Its totient is φ = 21031222225332.

The previous prime is 21031222225331. The next prime is 21031222225373. The reversal of 21031222225333 is 33352222213012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12524188336209 + 8507033889124 = 3538953^2 + 2916682^2 .

It is a cyclic number.

It is not a de Polignac number, because 21031222225333 - 2¹ = 21031222225331 is a prime.

Together with 21031222225331, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21031222225295 and 21031222225304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21031222225331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515611112666 + 10515611112667.

It is an arithmetic number, because the mean of its divisors is an integer number (10515611112667).

Almost surely, 2^{21031222225333} is an apocalyptic number.

It is an amenable number.

21031222225333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031222225333 is an equidigital number, since it uses as much as digits as its factorization.

21031222225333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 21031222225333 its reverse (33352222213012), we get a palindrome (54383444438345).

The spelling of 21031222225333 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-two million, two hundred twenty-five thousand, three hundred thirty-three".