21110122101111 has 32 divisors (see below), whose sum is σ = 29605089282048. Its totient is φ = 13361517985920.

The previous prime is 21110122101097. The next prime is 21110122101121. The reversal of 21110122101111 is 11110122101112.

It is not a de Polignac number, because 21110122101111 - 2⁷ = 21110122100983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110122101121) 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, 73135405 + ... + 73423481.

It is an arithmetic number, because the mean of its divisors is an integer number (925159040064).

Almost surely, 2^{21110122101111} is an apocalyptic number.

21110122101111 is a deficient number, since it is larger than the sum of its proper divisors (8494967180937).

21110122101111 is a wasteful number, since it uses less digits than its factorization.

21110122101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303031.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21110122101111 its reverse (11110122101112), we get a palindrome (32220244202223).

Subtracting from 21110122101111 its reverse (11110122101112), we obtain a palindrome (9999999999999).

The spelling of 21110122101111 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-two million, one hundred one thousand, one hundred eleven".