221100000000111 has 40 divisors (see below), whose sum is σ = 347727767587200. Its totient is φ = 139618346852880.

The previous prime is 221100000000041. The next prime is 221100000000127. The reversal of 221100000000111 is 111000000001122.

It is a happy number.

It is not a de Polignac number, because 221100000000111 - 2²³ = 221099991611503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 221100000000093 and 221100000000102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100000000181) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3170685 + ... + 21266246.

It is an arithmetic number, because the mean of its divisors is an integer number (8693194189680).

Almost surely, 2^{221100000000111} is an apocalyptic number.

221100000000111 is a deficient number, since it is larger than the sum of its proper divisors (126627767587089).

221100000000111 is a wasteful number, since it uses less digits than its factorization.

221100000000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24442841 (or 24442832 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 221100000000111 its reverse (111000000001122), we get a palindrome (332100000001233).

The spelling of 221100000000111 in words is "two hundred twenty-one trillion, one hundred billion, one hundred eleven", and thus it is an aban number.