21220122102205 has 32 divisors (see below), whose sum is σ = 28869702220800. Its totient is φ = 14843713231872.

The previous prime is 21220122102173. The next prime is 21220122102227. The reversal of 21220122102205 is 50220122102212.

It is a cyclic number.

It is not a de Polignac number, because 21220122102205 - 2⁵ = 21220122102173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9309172 + ... + 11362258.

It is an arithmetic number, because the mean of its divisors is an integer number (902178194400).

Almost surely, 2^{21220122102205} is an apocalyptic number.

It is an amenable number.

21220122102205 is a deficient number, since it is larger than the sum of its proper divisors (7649580118595).

21220122102205 is a wasteful number, since it uses less digits than its factorization.

21220122102205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061493.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21220122102205 its reverse (50220122102212), we get a palindrome (71440244204417).

The spelling of 21220122102205 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred two thousand, two hundred five".