21220102222111 has 32 divisors (see below), whose sum is σ = 24220327622400. Its totient is φ = 18417553528320.

The previous prime is 21220102222103. The next prime is 21220102222133. The reversal of 21220102222111 is 11122220102212.

It is a cyclic number.

It is not a de Polignac number, because 21220102222111 - 2³ = 21220102222103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220102225111) 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 31 ways as a sum of consecutive naturals, for example, 1218207160 + ... + 1218224578.

It is an arithmetic number, because the mean of its divisors is an integer number (756885238200).

Almost surely, 2^{21220102222111} is an apocalyptic number.

21220102222111 is a deficient number, since it is larger than the sum of its proper divisors (3000225400289).

21220102222111 is a wasteful number, since it uses less digits than its factorization.

21220102222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22519.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21220102222111 its reverse (11122220102212), we get a palindrome (32342322324323).

The spelling of 21220102222111 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, two hundred twenty-two thousand, one hundred eleven".