221604410123 has 8 divisors (see below), whose sum is σ = 224653891008. Its totient is φ = 218555302464.

The previous prime is 221604410099. The next prime is 221604410141. The reversal of 221604410123 is 321014406122.

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 221604410123 - 2¹⁰ = 221604409099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221604410092 and 221604410101.

It is not an unprimeable number, because it can be changed into a prime (221604410173) 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, 1230686 + ... + 1399212.

It is an arithmetic number, because the mean of its divisors is an integer number (28081736376).

Almost surely, 2^221604410123 is an apocalyptic number.

221604410123 is a deficient number, since it is larger than the sum of its proper divisors (3049480885).

221604410123 is a wasteful number, since it uses less digits than its factorization.

221604410123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186613.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 221604410123 its reverse (321014406122), we get a palindrome (542618816245).

The spelling of 221604410123 in words is "two hundred twenty-one billion, six hundred four million, four hundred ten thousand, one hundred twenty-three".