221200112122 has 16 divisors (see below), whose sum is σ = 370381584672. Its totient is φ = 98207237520.

The previous prime is 221200112099. The next prime is 221200112141. The reversal of 221200112122 is 221211002122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221200112096 and 221200112105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116912433 + ... + 116914324.

It is an arithmetic number, because the mean of its divisors is an integer number (23148849042).

Almost surely, 2^221200112122 is an apocalyptic number.

221200112122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221200112122 is a deficient number, since it is larger than the sum of its proper divisors (149181472550).

221200112122 is a wasteful number, since it uses less digits than its factorization.

221200112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233826813.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221200112122 its reverse (221211002122), we get a palindrome (442411114244).

Subtracting 221200112122 from its reverse (221211002122), we obtain a square (10890000 = 3300²).

The spelling of 221200112122 in words is "two hundred twenty-one billion, two hundred million, one hundred twelve thousand, one hundred twenty-two".