21313311220111 has 2 divisors, whose sum is σ = 21313311220112. Its totient is φ = 21313311220110.

The previous prime is 21313311220079. The next prime is 21313311220199. The reversal of 21313311220111 is 11102211331312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313311220111 - 2⁵ = 21313311220079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313311227111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656655610055 + 10656655610056.

It is an arithmetic number, because the mean of its divisors is an integer number (10656655610056).

Almost surely, 2^{21313311220111} is an apocalyptic number.

21313311220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313311220111 is an equidigital number, since it uses as much as digits as its factorization.

21313311220111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21313311220111 its reverse (11102211331312), we get a palindrome (32415522551423).

The spelling of 21313311220111 in words is "twenty-one trillion, three hundred thirteen billion, three hundred eleven million, two hundred twenty thousand, one hundred eleven".