221100022221111 has 32 divisors (see below), whose sum is σ = 357411103315200. Its totient is φ = 133970863191840.

The previous prime is 221100022221109. The next prime is 221100022221163. The reversal of 221100022221111 is 111122220001122.

221100022221111 is a `hidden beast` number, since 221 + 1 + 0 + 0 + 0 + 222 + 211 + 11 = 666.

It is not a de Polignac number, because 221100022221111 - 2¹ = 221100022221109 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100022221511) 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 31 ways as a sum of consecutive naturals, for example, 79605381 + ... + 82335998.

It is an arithmetic number, because the mean of its divisors is an integer number (11169096978600).

Almost surely, 2^{221100022221111} is an apocalyptic number.

221100022221111 is a deficient number, since it is larger than the sum of its proper divisors (136311081094089).

221100022221111 is a wasteful number, since it uses less digits than its factorization.

221100022221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161945996 (or 161945990 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221100022221111 its reverse (111122220001122), we get a palindrome (332222242222233).

The spelling of 221100022221111 in words is "two hundred twenty-one trillion, one hundred billion, twenty-two million, two hundred twenty-one thousand, one hundred eleven".