221020110022111 has 16 divisors (see below), whose sum is σ = 223533815281920. Its totient is φ = 218512814227200.

The previous prime is 221020110022067. The next prime is 221020110022121. The reversal of 221020110022111 is 111220011020122.

It is a cyclic number.

It is not a de Polignac number, because 221020110022111 - 2⁷ = 221020110021983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020110022121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1838357746 + ... + 1838477968.

It is an arithmetic number, because the mean of its divisors is an integer number (13970863455120).

Almost surely, 2^{221020110022111} is an apocalyptic number.

221020110022111 is a deficient number, since it is larger than the sum of its proper divisors (2513705259809).

221020110022111 is a wasteful number, since it uses less digits than its factorization.

221020110022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146706.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221020110022111 its reverse (111220011020122), we get a palindrome (332240121042233).

The spelling of 221020110022111 in words is "two hundred twenty-one trillion, twenty billion, one hundred ten million, twenty-two thousand, one hundred eleven".