21222016352527 has 2 divisors, whose sum is σ = 21222016352528. Its totient is φ = 21222016352526.

The previous prime is 21222016352507. The next prime is 21222016352557. The reversal of 21222016352527 is 72525361022212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222016352527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21222016352527.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222016352507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611008176263 + 10611008176264.

It is an arithmetic number, because the mean of its divisors is an integer number (10611008176264).

Almost surely, 2^{21222016352527} is an apocalyptic number.

21222016352527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222016352527 is an equidigital number, since it uses as much as digits as its factorization.

21222016352527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 40.

Adding to 21222016352527 its reverse (72525361022212), we get a palindrome (93747377374739).

The spelling of 21222016352527 in words is "twenty-one trillion, two hundred twenty-two billion, sixteen million, three hundred fifty-two thousand, five hundred twenty-seven".