221001013321111 has 2 divisors, whose sum is σ = 221001013321112. Its totient is φ = 221001013321110.

The previous prime is 221001013321087. The next prime is 221001013321181. The reversal of 221001013321111 is 111123310100122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221001013321111 - 2⁵ = 221001013321079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221001013321181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500506660555 + 110500506660556.

It is an arithmetic number, because the mean of its divisors is an integer number (110500506660556).

Almost surely, 2^{221001013321111} is an apocalyptic number.

221001013321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001013321111 is an equidigital number, since it uses as much as digits as its factorization.

221001013321111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 221001013321111 its reverse (111123310100122), we get a palindrome (332124323421233).

The spelling of 221001013321111 in words is "two hundred twenty-one trillion, one billion, thirteen million, three hundred twenty-one thousand, one hundred eleven".