21110120122211 has 2 divisors, whose sum is σ = 21110120122212. Its totient is φ = 21110120122210.

The previous prime is 21110120122187. The next prime is 21110120122271. The reversal of 21110120122211 is 11222102101112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110120122211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110120122211.

It is not a weakly prime, because it can be changed into another prime (21110120122271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555060061105 + 10555060061106.

It is an arithmetic number, because the mean of its divisors is an integer number (10555060061106).

Almost surely, 2^{21110120122211} is an apocalyptic number.

21110120122211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110120122211 is an equidigital number, since it uses as much as digits as its factorization.

21110120122211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21110120122211 its reverse (11222102101112), we get a palindrome (32332222223323).

The spelling of 21110120122211 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty million, one hundred twenty-two thousand, two hundred eleven".