221110121020011 has 16 divisors (see below), whose sum is σ = 295450529218560. Its totient is φ = 147088274997440.

The previous prime is 221110121019971. The next prime is 221110121020093. The reversal of 221110121020011 is 110020121011122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221110121020011 - 2⁷ = 221110121019883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221110121020211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14110006 + ... + 25324148.

It is an arithmetic number, because the mean of its divisors is an integer number (18465658076160).

Almost surely, 2^{221110121020011} is an apocalyptic number.

221110121020011 is a deficient number, since it is larger than the sum of its proper divisors (74340408198549).

221110121020011 is a wasteful number, since it uses less digits than its factorization.

221110121020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11228346.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221110121020011 its reverse (110020121011122), we get a palindrome (331130242031133).

The spelling of 221110121020011 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty-one million, twenty thousand, eleven".