21010111110011 has 4 divisors (see below), whose sum is σ = 21115689558000. Its totient is φ = 20904532662024.

The previous prime is 21010111109983. The next prime is 21010111110091. The reversal of 21010111110011 is 11001111101012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21010111110011 - 2¹⁴ = 21010111093627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010111109974 and 21010111110001.

It is not an unprimeable number, because it can be changed into a prime (21010111110091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52789223696 + ... + 52789224093.

It is an arithmetic number, because the mean of its divisors is an integer number (5278922389500).

Almost surely, 2^{21010111110011} is an apocalyptic number.

21010111110011 is a deficient number, since it is larger than the sum of its proper divisors (105578447989).

21010111110011 is a wasteful number, since it uses less digits than its factorization.

21010111110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105578447988.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 21010111110011 its reverse (11001111101012), we get a palindrome (32011222211023).

The spelling of 21010111110011 in words is "twenty-one trillion, ten billion, one hundred eleven million, one hundred ten thousand, eleven".