21112000011 has 12 divisors (see below), whose sum is σ = 30502141488. Its totient is φ = 14071421904.

The previous prime is 21111999947. The next prime is 21112000097. The reversal of 21112000011 is 11000021112.

It is a happy number.

It is not a de Polignac number, because 21112000011 - 2⁶ = 21111999947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21111999957 and 21112000002.

It is not an unprimeable number, because it can be changed into a prime (21112008011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228855 + ... + 307568.

It is an arithmetic number, because the mean of its divisors is an integer number (2541845124).

Almost surely, 2^21112000011 is an apocalyptic number.

21112000011 is a deficient number, since it is larger than the sum of its proper divisors (9390141477).

21112000011 is a wasteful number, since it uses less digits than its factorization.

21112000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540802 (or 540799 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21112000011 its reverse (11000021112), we get a palindrome (32112021123).

The spelling of 21112000011 in words is "twenty-one billion, one hundred twelve million, eleven", and thus it is an aban number.