21522201327 has 12 divisors (see below), whose sum is σ = 33913771944. Its totient is φ = 13043758320.

The previous prime is 21522201301. The next prime is 21522201347. The reversal of 21522201327 is 72310222512.

21522201327 is a `hidden beast` number, since 2 + 1 + 522 + 2 + 0 + 132 + 7 = 666.

It is not a de Polignac number, because 21522201327 - 2¹⁸ = 21521939183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21522201327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522201347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108697888 + ... + 108698085.

It is an arithmetic number, because the mean of its divisors is an integer number (2826147662).

Almost surely, 2^21522201327 is an apocalyptic number.

21522201327 is a deficient number, since it is larger than the sum of its proper divisors (12391570617).

21522201327 is a wasteful number, since it uses less digits than its factorization.

21522201327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217395990 (or 217395987 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

Adding to 21522201327 its reverse (72310222512), we get a palindrome (93832423839).

The spelling of 21522201327 in words is "twenty-one billion, five hundred twenty-two million, two hundred one thousand, three hundred twenty-seven".