21120000011 has 8 divisors (see below), whose sum is σ = 23268120048. Its totient is φ = 19009900000.

The previous prime is 21119999981. The next prime is 21120000017. The reversal of 21120000011 is 11000002112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120000011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120000017) 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, 9503840 + ... + 9506061.

It is an arithmetic number, because the mean of its divisors is an integer number (2908515006).

Almost surely, 2^21120000011 is an apocalyptic number.

21120000011 is a deficient number, since it is larger than the sum of its proper divisors (2148120037).

21120000011 is a wasteful number, since it uses less digits than its factorization.

21120000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19010013.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21120000011 its reverse (11000002112), we get a palindrome (32120002123).

The spelling of 21120000011 in words is "twenty-one billion, one hundred twenty million, eleven", and thus it is an aban number.