221111102122 has 16 divisors (see below), whose sum is σ = 339405973632. Its totient is φ = 107976173760.

The previous prime is 221111102083. The next prime is 221111102129. The reversal of 221111102122 is 221201111122.

It is a junction number, because it is equal to n+sod(n) for n = 221111102096 and 221111102105.

It is not an unprimeable number, because it can be changed into a prime (221111102129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109122 + ... + 1293202.

It is an arithmetic number, because the mean of its divisors is an integer number (21212873352).

Almost surely, 2^221111102122 is an apocalyptic number.

221111102122 is a deficient number, since it is larger than the sum of its proper divisors (118294871510).

221111102122 is a wasteful number, since it uses less digits than its factorization.

221111102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198093.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221111102122 its reverse (221201111122), we get a palindrome (442312213244).

The spelling of 221111102122 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred twenty-two".