1424331221 has 4 divisors (see below), whose sum is σ = 1425600672. Its totient is φ = 1423061772.

The previous prime is 1424331217. The next prime is 1424331253. The reversal of 1424331221 is 1221334241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1424331221 - 2² = 1424331217 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 (1424331721) 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, 633041 + ... + 635286.

It is an arithmetic number, because the mean of its divisors is an integer number (356400168).

Almost surely, 2^1424331221 is an apocalyptic number.

It is an amenable number.

1424331221 is a deficient number, since it is larger than the sum of its proper divisors (1269451).

1424331221 is a wasteful number, since it uses less digits than its factorization.

1424331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269450.

The product of its digits is 1152, while the sum is 23.

The square root of 1424331221 is about 37740.3129425287. The cubic root of 1424331221 is about 1125.1324870471.

Adding to 1424331221 its reverse (1221334241), we get a palindrome (2645665462).

The spelling of 1424331221 in words is "one billion, four hundred twenty-four million, three hundred thirty-one thousand, two hundred twenty-one".