21100222111011 has 16 divisors (see below), whose sum is σ = 28535071163424. Its totient is φ = 13866310785024.

The previous prime is 21100222110977. The next prime is 21100222111021. The reversal of 21100222111011 is 11011122200112.

It is a happy number.

It is not a de Polignac number, because 21100222111011 - 2¹³ = 21100222102819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100222111021) 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 15 ways as a sum of consecutive naturals, for example, 26720586 + ... + 27498911.

It is an arithmetic number, because the mean of its divisors is an integer number (1783441947714).

Almost surely, 2^{21100222111011} is an apocalyptic number.

21100222111011 is a deficient number, since it is larger than the sum of its proper divisors (7434849052413).

21100222111011 is a wasteful number, since it uses less digits than its factorization.

21100222111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54221350.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21100222111011 its reverse (11011122200112), we get a palindrome (32111344311123).

The spelling of 21100222111011 in words is "twenty-one trillion, one hundred billion, two hundred twenty-two million, one hundred eleven thousand, eleven".