21522663227210 has 16 divisors (see below), whose sum is σ = 38741421076992. Its totient is φ = 8608925898000.

The previous prime is 21522663227189. The next prime is 21522663227281. The reversal of 21522663227210 is 1272236622512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16774466 + ... + 18011885.

It is an arithmetic number, because the mean of its divisors is an integer number (2421338817312).

Almost surely, 2^{21522663227210} is an apocalyptic number.

21522663227210 is a deficient number, since it is larger than the sum of its proper divisors (17218757849782).

21522663227210 is a wasteful number, since it uses less digits than its factorization.

21522663227210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34848229.

The product of its (nonzero) digits is 241920, while the sum is 41.

Adding to 21522663227210 its reverse (1272236622512), we get a palindrome (22794899849722).

The spelling of 21522663227210 in words is "twenty-one trillion, five hundred twenty-two billion, six hundred sixty-three million, two hundred twenty-seven thousand, two hundred ten".