2223125421 has 32 divisors (see below), whose sum is σ = 3384806400. Its totient is φ = 1284729600.

The previous prime is 2223125389. The next prime is 2223125447. The reversal of 2223125421 is 1245213222.

It is not a de Polignac number, because 2223125421 - 2⁵ = 2223125389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2223125391 and 2223125400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223125321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246805 + ... + 255653.

It is an arithmetic number, because the mean of its divisors is an integer number (105775200).

Almost surely, 2^2223125421 is an apocalyptic number.

It is an amenable number.

2223125421 is a deficient number, since it is larger than the sum of its proper divisors (1161680979).

2223125421 is a wasteful number, since it uses less digits than its factorization.

2223125421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9217.

The product of its digits is 1920, while the sum is 24.

The square root of 2223125421 is about 47150.0309755996. The cubic root of 2223125421 is about 1305.1326516263.

Adding to 2223125421 its reverse (1245213222), we get a palindrome (3468338643).

The spelling of 2223125421 in words is "two billion, two hundred twenty-three million, one hundred twenty-five thousand, four hundred twenty-one".