221040123 has 8 divisors (see below), whose sum is σ = 295104528. Its totient is φ = 147167904.

The previous prime is 221040121. The next prime is 221040179. The reversal of 221040123 is 321040122.

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

It is not a de Polignac number, because 221040123 - 2¹ = 221040121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221040121) 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, 45340 + ... + 49977.

It is an arithmetic number, because the mean of its divisors is an integer number (36888066).

Almost surely, 2^221040123 is an apocalyptic number.

221040123 is a deficient number, since it is larger than the sum of its proper divisors (74064405).

221040123 is an equidigital number, since it uses as much as digits as its factorization.

221040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96093.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221040123 is about 14867.4181685994. The cubic root of 221040123 is about 604.6309458329.

Adding to 221040123 its reverse (321040122), we get a palindrome (542080245).

Subtracting 221040123 from its reverse (321040122), we obtain a palindrome (99999999).

The spelling of 221040123 in words is "two hundred twenty-one million, forty thousand, one hundred twenty-three".