221023123 has 8 divisors (see below), whose sum is σ = 238586400. Its totient is φ = 204122688.

The previous prime is 221023111. The next prime is 221023129. The reversal of 221023123 is 321320122.

221023123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221023123 - 2¹³ = 221014931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221023097 and 221023106.

It is not an unprimeable number, because it can be changed into a prime (221023129) 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, 165018 + ... + 166351.

It is an arithmetic number, because the mean of its divisors is an integer number (29823300).

Almost surely, 2^221023123 is an apocalyptic number.

221023123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221023123 is a deficient number, since it is larger than the sum of its proper divisors (17563277).

221023123 is a wasteful number, since it uses less digits than its factorization.

221023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331421.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221023123 is about 14866.8464376276. The cubic root of 221023123 is about 604.6154448921.

Adding to 221023123 its reverse (321320122), we get a palindrome (542343245).

The spelling of 221023123 in words is "two hundred twenty-one million, twenty-three thousand, one hundred twenty-three".