21001110011 has 16 divisors (see below), whose sum is σ = 24163292160. Its totient is φ = 17879832000.

The previous prime is 21001109999. The next prime is 21001110103. The reversal of 21001110011 is 11001110012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21001110011 - 2⁶ = 21001109947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21001110311) 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 15 ways as a sum of consecutive naturals, for example, 628535 + ... + 661103.

It is an arithmetic number, because the mean of its divisors is an integer number (1510205760).

Almost surely, 2^21001110011 is an apocalyptic number.

21001110011 is a deficient number, since it is larger than the sum of its proper divisors (3162182149).

21001110011 is a wasteful number, since it uses less digits than its factorization.

21001110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33194.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21001110011 its reverse (11001110012), we get a palindrome (32002220023).

Subtracting from 21001110011 its reverse (11001110012), we obtain a palindrome (9999999999).

It can be divided in two parts, 210011 and 10011, that added together give a palindrome (220022).

The spelling of 21001110011 in words is "twenty-one billion, one million, one hundred ten thousand, eleven".