21120220110211 has 2 divisors, whose sum is σ = 21120220110212. Its totient is φ = 21120220110210.

The previous prime is 21120220110191. The next prime is 21120220110247. The reversal of 21120220110211 is 11201102202112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120220110211 is a prime.

It is a super-2 number, since 2×21120220110211² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21120220110251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560110055105 + 10560110055106.

It is an arithmetic number, because the mean of its divisors is an integer number (10560110055106).

Almost surely, 2^{21120220110211} is an apocalyptic number.

21120220110211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120220110211 is an equidigital number, since it uses as much as digits as its factorization.

21120220110211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120220110211 its reverse (11201102202112), we get a palindrome (32321322312323).

The spelling of 21120220110211 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, one hundred ten thousand, two hundred eleven".