221123104 has 24 divisors (see below), whose sum is σ = 454265280. Its totient is φ = 105754176.

The previous prime is 221123101. The next prime is 221123113. The reversal of 221123104 is 401321122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (221123101) 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, 149484 + ... + 150955.

It is an arithmetic number, because the mean of its divisors is an integer number (18927720).

Almost surely, 2^221123104 is an apocalyptic number.

It is an amenable number.

221123104 is an abundant number, since it is smaller than the sum of its proper divisors (233142176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221123104 is a wasteful number, since it uses less digits than its factorization.

221123104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300472 (or 300464 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221123104 is about 14870.2086064722. The cubic root of 221123104 is about 604.7065981665.

Adding to 221123104 its reverse (401321122), we get a palindrome (622444226).

The spelling of 221123104 in words is "two hundred twenty-one million, one hundred twenty-three thousand, one hundred four".