221102111111 has 8 divisors (see below), whose sum is σ = 256247115264. Its totient is φ = 186846854040.

The previous prime is 221102111101. The next prime is 221102111137. The reversal of 221102111111 is 111111201122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221102111111 - 2²² = 221097916807 is a prime.

It is a super-2 number, since 2×221102111111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102111101) 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 7 ways as a sum of consecutive naturals, for example, 222436235 + ... + 222437228.

It is an arithmetic number, because the mean of its divisors is an integer number (32030889408).

Almost surely, 2^221102111111 is an apocalyptic number.

221102111111 is a deficient number, since it is larger than the sum of its proper divisors (35145004153).

221102111111 is an equidigital number, since it uses as much as digits as its factorization.

221102111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444873541.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221102111111 its reverse (111111201122), we get a palindrome (332213312233).

The spelling of 221102111111 in words is "two hundred twenty-one billion, one hundred two million, one hundred eleven thousand, one hundred eleven".