21522814512229 has 2 divisors, whose sum is σ = 21522814512230. Its totient is φ = 21522814512228.

The previous prime is 21522814512187. The next prime is 21522814512247. The reversal of 21522814512229 is 92221541822512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18426629390625 + 3096185121604 = 4292625^2 + 1759598^2 .

It is a cyclic number.

It is not a de Polignac number, because 21522814512229 - 2¹¹ = 21522814510181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21522814512929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10761407256114 + 10761407256115.

It is an arithmetic number, because the mean of its divisors is an integer number (10761407256115).

Almost surely, 2^{21522814512229} is an apocalyptic number.

It is an amenable number.

21522814512229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522814512229 is an equidigital number, since it uses as much as digits as its factorization.

21522814512229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 46.

The spelling of 21522814512229 in words is "twenty-one trillion, five hundred twenty-two billion, eight hundred fourteen million, five hundred twelve thousand, two hundred twenty-nine".