221120123 has 8 divisors (see below), whose sum is σ = 254170848. Its totient is φ = 188434944.

The previous prime is 221120113. The next prime is 221120129. The reversal of 221120123 is 321021122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221120123 - 2²⁶ = 154011259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221120098 and 221120107.

It is not an unprimeable number, because it can be changed into a prime (221120129) 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, 90086 + ... + 92507.

It is an arithmetic number, because the mean of its divisors is an integer number (31771356).

Almost surely, 2^221120123 is an apocalyptic number.

221120123 is a deficient number, since it is larger than the sum of its proper divisors (33050725).

221120123 is a wasteful number, since it uses less digits than its factorization.

221120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182773.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221120123 is about 14870.1083721673. The cubic root of 221120123 is about 604.7038807684.

Adding to 221120123 its reverse (321021122), we get a palindrome (542141245).

Subtracting 221120123 from its reverse (321021122), we obtain a palindrome (99900999).

The spelling of 221120123 in words is "two hundred twenty-one million, one hundred twenty thousand, one hundred twenty-three".