21110000011 has 4 divisors (see below), whose sum is σ = 21508301952. Its totient is φ = 20711698072.

The previous prime is 21110000003. The next prime is 21110000057. The reversal of 21110000011 is 11000001112.

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 21110000011 - 2³ = 21110000003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21109999949 and 21110000003.

It is not an unprimeable number, because it can be changed into a prime (21110000081) 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, 199150891 + ... + 199150996.

It is an arithmetic number, because the mean of its divisors is an integer number (5377075488).

Almost surely, 2^21110000011 is an apocalyptic number.

21110000011 is a deficient number, since it is larger than the sum of its proper divisors (398301941).

21110000011 is an equidigital number, since it uses as much as digits as its factorization.

21110000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398301940.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 21110000011 its reverse (11000001112), we get a palindrome (32110001123).

The spelling of 21110000011 in words is "twenty-one billion, one hundred ten million, eleven", and thus it is an aban number.