21112211102211 has 24 divisors (see below), whose sum is σ = 30882004287680. Its totient is φ = 13896388636416.

The previous prime is 21112211102123. The next prime is 21112211102243. The reversal of 21112211102211 is 11220111221112.

It is a happy number.

21112211102211 is a `hidden beast` number, since 2 + 111 + 221 + 110 + 221 + 1 = 666.

It is not a de Polignac number, because 21112211102211 - 2¹¹ = 21112211100163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112211102111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43065405 + ... + 43552881.

Almost surely, 2^{21112211102211} is an apocalyptic number.

21112211102211 is a deficient number, since it is larger than the sum of its proper divisors (9769793185469).

21112211102211 is a wasteful number, since it uses less digits than its factorization.

21112211102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548475 (or 548472 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 21112211102211 its reverse (11220111221112), we get a palindrome (32332322323323).

The spelling of 21112211102211 in words is "twenty-one trillion, one hundred twelve billion, two hundred eleven million, one hundred two thousand, two hundred eleven".