21112221100111 has 8 divisors (see below), whose sum is σ = 21191256279648. Its totient is φ = 21033213600000.

The previous prime is 21112221100109. The next prime is 21112221100163. The reversal of 21112221100111 is 11100112221112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21112221100111 - 2¹ = 21112221100109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112221107111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5390890 + ... + 8443111.

It is an arithmetic number, because the mean of its divisors is an integer number (2648907034956).

Almost surely, 2^{21112221100111} is an apocalyptic number.

21112221100111 is a deficient number, since it is larger than the sum of its proper divisors (79035179537).

21112221100111 is a wasteful number, since it uses less digits than its factorization.

21112221100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13839713.

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

Adding to 21112221100111 its reverse (11100112221112), we get a palindrome (32212333321223).

The spelling of 21112221100111 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred thousand, one hundred eleven".