21102221102211 has 24 divisors (see below), whose sum is σ = 30499848681120. Its totient is φ = 14059444000896.

The previous prime is 21102221102201. The next prime is 21102221102243. The reversal of 21102221102211 is 11220112220112.

21102221102211 is a `hidden beast` number, since 2 + 110 + 222 + 110 + 221 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21102221102211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102221102201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107790631 + ... + 107986223.

It is an arithmetic number, because the mean of its divisors is an integer number (1270827028380).

Almost surely, 2^{21102221102211} is an apocalyptic number.

21102221102211 is a deficient number, since it is larger than the sum of its proper divisors (9397627578909).

21102221102211 is a wasteful number, since it uses less digits than its factorization.

21102221102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202955 (or 202952 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21102221102211 its reverse (11220112220112), we get a palindrome (32322333322323).

The spelling of 21102221102211 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-one million, one hundred two thousand, two hundred eleven".