21000110110211 has 16 divisors (see below), whose sum is σ = 22891358423040. Its totient is φ = 19191560506560.

The previous prime is 21000110110181. The next prime is 21000110110229. The reversal of 21000110110211 is 11201101100012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000110110211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000110110192 and 21000110110201.

It is not an unprimeable number, because it can be changed into a prime (21000110110711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56770655 + ... + 57139368.

It is an arithmetic number, because the mean of its divisors is an integer number (1430709901440).

Almost surely, 2^{21000110110211} is an apocalyptic number.

21000110110211 is a deficient number, since it is larger than the sum of its proper divisors (1891248312829).

21000110110211 is a wasteful number, since it uses less digits than its factorization.

21000110110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113910386.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21000110110211 its reverse (11201101100012), we get a palindrome (32201211210223).

The spelling of 21000110110211 in words is "twenty-one trillion, one hundred ten million, one hundred ten thousand, two hundred eleven".