221120222123 has 4 divisors (see below), whose sum is σ = 230734144848. Its totient is φ = 211506299400.

The previous prime is 221120222117. The next prime is 221120222153. The reversal of 221120222123 is 321222021122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221120222123 - 2⁴ = 221120222107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221120222095 and 221120222104.

It is not an unprimeable number, because it can be changed into a prime (221120222153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4806961328 + ... + 4806961373.

It is an arithmetic number, because the mean of its divisors is an integer number (57683536212).

Almost surely, 2^221120222123 is an apocalyptic number.

221120222123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221120222123 is a deficient number, since it is larger than the sum of its proper divisors (9613922725).

221120222123 is an equidigital number, since it uses as much as digits as its factorization.

221120222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9613922724.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221120222123 its reverse (321222021122), we get a palindrome (542342243245).

The spelling of 221120222123 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-three".