21110211222211 has 2 divisors, whose sum is σ = 21110211222212. Its totient is φ = 21110211222210.

The previous prime is 21110211222197. The next prime is 21110211222271. The reversal of 21110211222211 is 11222211201112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110211222211 - 2⁷ = 21110211222083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110211222271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555105611105 + 10555105611106.

It is an arithmetic number, because the mean of its divisors is an integer number (10555105611106).

Almost surely, 2^{21110211222211} is an apocalyptic number.

21110211222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110211222211 is an equidigital number, since it uses as much as digits as its factorization.

21110211222211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21110211222211 its reverse (11222211201112), we get a palindrome (32332422423323).

The spelling of 21110211222211 in words is "twenty-one trillion, one hundred ten billion, two hundred eleven million, two hundred twenty-two thousand, two hundred eleven".