21112110011 has 8 divisors (see below), whose sum is σ = 21153778800. Its totient is φ = 21070484352.

The previous prime is 21112109999. The next prime is 21112110031. The reversal of 21112110011 is 11001121112.

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 21112110011 - 2⁶ = 21112109947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112109974 and 21112110001.

It is not an unprimeable number, because it can be changed into a prime (21112110031) 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, 1073876 + ... + 1093358.

It is an arithmetic number, because the mean of its divisors is an integer number (2644222350).

Almost surely, 2^21112110011 is an apocalyptic number.

21112110011 is a deficient number, since it is larger than the sum of its proper divisors (41668789).

21112110011 is a wasteful number, since it uses less digits than its factorization.

21112110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21565.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21112110011 its reverse (11001121112), we get a palindrome (32113231123).

It can be divided in two parts, 21112 and 110011, that multiplied together give a palindrome (2322552232).

The spelling of 21112110011 in words is "twenty-one billion, one hundred twelve million, one hundred ten thousand, eleven".