221102112201111 has 6 divisors (see below), whose sum is σ = 319369717623840. Its totient is φ = 147401408134068.

The previous prime is 221102112201107. The next prime is 221102112201137. The reversal of 221102112201111 is 111102211201122.

It is a happy number.

221102112201111 is a `hidden beast` number, since 2 + 211 + 0 + 211 + 220 + 11 + 11 = 666.

It is not a de Polignac number, because 221102112201111 - 2² = 221102112201107 is a prime.

It is a super-2 number, since 2×221102112201111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102112301111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12283450677831 + ... + 12283450677848.

It is an arithmetic number, because the mean of its divisors is an integer number (53228286270640).

Almost surely, 2^{221102112201111} is an apocalyptic number.

221102112201111 is a deficient number, since it is larger than the sum of its proper divisors (98267605422729).

221102112201111 is a wasteful number, since it uses less digits than its factorization.

221102112201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24566901355685 (or 24566901355682 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221102112201111 its reverse (111102211201122), we get a palindrome (332204323402233).

The spelling of 221102112201111 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twelve million, two hundred one thousand, one hundred eleven".