21222210210111 has 6 divisors (see below), whose sum is σ = 30654303636840. Its totient is φ = 14148140140068.

The previous prime is 21222210210029. The next prime is 21222210210139. The reversal of 21222210210111 is 11101201222212.

21222210210111 is a `hidden beast` number, since 2 + 122 + 221 + 0 + 210 + 111 = 666.

It is not a de Polignac number, because 21222210210111 - 2⁷ = 21222210209983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222210210511) 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 5 ways as a sum of consecutive naturals, for example, 1179011678331 + ... + 1179011678348.

It is an arithmetic number, because the mean of its divisors is an integer number (5109050606140).

Almost surely, 2^{21222210210111} is an apocalyptic number.

21222210210111 is a deficient number, since it is larger than the sum of its proper divisors (9432093426729).

21222210210111 is a wasteful number, since it uses less digits than its factorization.

21222210210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358023356685 (or 2358023356682 counting only the distinct ones).

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

Adding to 21222210210111 its reverse (11101201222212), we get a palindrome (32323411432323).

The spelling of 21222210210111 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, two hundred ten thousand, one hundred eleven".