1223325421 has 4 divisors (see below), whose sum is σ = 1234548700. Its totient is φ = 1212102144.

The previous prime is 1223325409. The next prime is 1223325437. The reversal of 1223325421 is 1245233221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1245233221 = 17 ⋅73249013.

It can be written as a sum of positive squares in 2 ways, for example, as 375933321 + 847392100 = 19389^2 + 29110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223325421 - 2¹⁹ = 1222801133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223325401) 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, 5611476 + ... + 5611693.

It is an arithmetic number, because the mean of its divisors is an integer number (308637175).

Almost surely, 2^1223325421 is an apocalyptic number.

It is an amenable number.

1223325421 is a deficient number, since it is larger than the sum of its proper divisors (11223279).

1223325421 is a wasteful number, since it uses less digits than its factorization.

1223325421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11223278.

The product of its digits is 2880, while the sum is 25.

The square root of 1223325421 is about 34976.0692617109. The cubic root of 1223325421 is about 1069.4996994381.

Adding to 1223325421 its reverse (1245233221), we get a palindrome (2468558642).

The spelling of 1223325421 in words is "one billion, two hundred twenty-three million, three hundred twenty-five thousand, four hundred twenty-one".