1123323200221 has 4 divisors (see below), whose sum is σ = 1124436504700. Its totient is φ = 1122209895744.

The previous prime is 1123323200149. The next prime is 1123323200249. The reversal of 1123323200221 is 1220023233211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 680931934596 + 442391265625 = 825186^2 + 665125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123323200221 - 2¹⁵ = 1123323167453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123323200192 and 1123323200201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123323200261) 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, 556650726 + ... + 556652743.

It is an arithmetic number, because the mean of its divisors is an integer number (281109126175).

Almost surely, 2^{1123323200221} is an apocalyptic number.

It is an amenable number.

1123323200221 is a deficient number, since it is larger than the sum of its proper divisors (1113304479).

1123323200221 is a wasteful number, since it uses less digits than its factorization.

1123323200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113304478.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1123323200221 its reverse (1220023233211), we get a palindrome (2343346433432).

The spelling of 1123323200221 in words is "one trillion, one hundred twenty-three billion, three hundred twenty-three million, two hundred thousand, two hundred twenty-one".