221101211122 has 16 divisors (see below), whose sum is σ = 366758176032. Its totient is φ = 99123829920.

The previous prime is 221101211101. The next prime is 221101211141. The reversal of 221101211122 is 221112101122.

It is a junction number, because it is equal to n+sod(n) for n = 221101211096 and 221101211105.

It is an unprimeable number.

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, 68834388 + ... + 68837599.

It is an arithmetic number, because the mean of its divisors is an integer number (22922386002).

Almost surely, 2^221101211122 is an apocalyptic number.

221101211122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221101211122 is a deficient number, since it is larger than the sum of its proper divisors (145656964910).

221101211122 is a wasteful number, since it uses less digits than its factorization.

221101211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137672073.

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

Adding to 221101211122 its reverse (221112101122), we get a palindrome (442213312244).

Subtracting 221101211122 from its reverse (221112101122), we obtain a square (10890000 = 3300²).

The spelling of 221101211122 in words is "two hundred twenty-one billion, one hundred one million, two hundred eleven thousand, one hundred twenty-two".