21211100011 has 16 divisors (see below), whose sum is σ = 21744108288. Its totient is φ = 20684628000.

The previous prime is 21211099979. The next prime is 21211100021. The reversal of 21211100011 is 11000111212.

It is a cyclic number.

It is not a de Polignac number, because 21211100011 - 2⁵ = 21211099979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211100021) 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, 5404896 + ... + 5408818.

It is an arithmetic number, because the mean of its divisors is an integer number (1359006768).

Almost surely, 2^21211100011 is an apocalyptic number.

21211100011 is a deficient number, since it is larger than the sum of its proper divisors (533008277).

21211100011 is a wasteful number, since it uses less digits than its factorization.

21211100011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21211100011 its reverse (11000111212), we get a palindrome (32211211223).

The spelling of 21211100011 in words is "twenty-one billion, two hundred eleven million, one hundred thousand, eleven".