221022100111 has 4 divisors (see below), whose sum is σ = 221102738424. Its totient is φ = 220941461800.

The previous prime is 221022100099. The next prime is 221022100129. The reversal of 221022100111 is 111001220122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221022100111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221022100091 and 221022100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022100151) 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 3 ways as a sum of consecutive naturals, for example, 40315045 + ... + 40320526.

It is an arithmetic number, because the mean of its divisors is an integer number (55275684606).

Almost surely, 2^221022100111 is an apocalyptic number.

221022100111 is a deficient number, since it is larger than the sum of its proper divisors (80638313).

221022100111 is an equidigital number, since it uses as much as digits as its factorization.

221022100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80638312.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221022100111 its reverse (111001220122), we get a palindrome (332023320233).

The spelling of 221022100111 in words is "two hundred twenty-one billion, twenty-two million, one hundred thousand, one hundred eleven".