21110111101 has 16 divisors (see below), whose sum is σ = 22470192000. Its totient is φ = 19775448000.

The previous prime is 21110111083. The next prime is 21110111107. The reversal of 21110111101 is 10111101112.

It is a cyclic number.

It is not a de Polignac number, because 21110111101 - 2¹⁵ = 21110078333 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 (21110111107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1568800 + ... + 1582198.

It is an arithmetic number, because the mean of its divisors is an integer number (1404387000).

Almost surely, 2^21110111101 is an apocalyptic number.

It is an amenable number.

21110111101 is a deficient number, since it is larger than the sum of its proper divisors (1360080899).

21110111101 is a wasteful number, since it uses less digits than its factorization.

21110111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14340.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21110111101 its reverse (10111101112), we get a palindrome (31221212213).

It can be divided in two parts, 2111011 and 1101, that added together give a palindrome (2112112).

The spelling of 21110111101 in words is "twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred one".