21110201121111 has 16 divisors (see below), whose sum is σ = 28157660294400. Its totient is φ = 14068105386048.

The previous prime is 21110201121109. The next prime is 21110201121151. The reversal of 21110201121111 is 11112110201112.

It is not a de Polignac number, because 21110201121111 - 2¹ = 21110201121109 is a prime.

It is a super-2 number, since 2×21110201121111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110201121151) 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, 132049635 + ... + 132209403.

It is an arithmetic number, because the mean of its divisors is an integer number (1759853768400).

Almost surely, 2^{21110201121111} is an apocalyptic number.

21110201121111 is a deficient number, since it is larger than the sum of its proper divisors (7047459173289).

21110201121111 is a wasteful number, since it uses less digits than its factorization.

21110201121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176278.

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

Adding to 21110201121111 its reverse (11112110201112), we get a palindrome (32222311322223).

The spelling of 21110201121111 in words is "twenty-one trillion, one hundred ten billion, two hundred one million, one hundred twenty-one thousand, one hundred eleven".