21100211011 has 8 divisors (see below), whose sum is σ = 24372436464. Its totient is φ = 18053656320.

The previous prime is 21100211009. The next prime is 21100211029. The reversal of 21100211011 is 11011200112.

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

It is a cyclic number.

It is not a de Polignac number, because 21100211011 - 2¹ = 21100211009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100211071) 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 7 ways as a sum of consecutive naturals, for example, 56417490 + ... + 56417863.

It is an arithmetic number, because the mean of its divisors is an integer number (3046554558).

Almost surely, 2^21100211011 is an apocalyptic number.

21100211011 is a deficient number, since it is larger than the sum of its proper divisors (3272225453).

21100211011 is a wasteful number, since it uses less digits than its factorization.

21100211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112835381.

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

Adding to 21100211011 its reverse (11011200112), we get a palindrome (32111411123).

The spelling of 21100211011 in words is "twenty-one billion, one hundred million, two hundred eleven thousand, eleven".