21120101110211 has 4 divisors (see below), whose sum is σ = 21120133155792. Its totient is φ = 21120069064632.

The previous prime is 21120101110187. The next prime is 21120101110237. The reversal of 21120101110211 is 11201110102112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120101110211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120101113211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15012980 + ... + 16359393.

It is an arithmetic number, because the mean of its divisors is an integer number (5280033288948).

Almost surely, 2^{21120101110211} is an apocalyptic number.

21120101110211 is a deficient number, since it is larger than the sum of its proper divisors (32045581).

21120101110211 is an equidigital number, since it uses as much as digits as its factorization.

21120101110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32045580.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21120101110211 its reverse (11201110102112), we get a palindrome (32321211212323).

The spelling of 21120101110211 in words is "twenty-one trillion, one hundred twenty billion, one hundred one million, one hundred ten thousand, two hundred eleven".