1330434221 has 4 divisors (see below), whose sum is σ = 1331945244. Its totient is φ = 1328923200.

The previous prime is 1330434179. The next prime is 1330434251. The reversal of 1330434221 is 1224340331.

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 250588900 + 1079845321 = 15830^2 + 32861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330434221 - 2¹⁰ = 1330433197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330434251) 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, 754190 + ... + 755951.

It is an arithmetic number, because the mean of its divisors is an integer number (332986311).

Almost surely, 2^1330434221 is an apocalyptic number.

It is an amenable number.

1330434221 is a deficient number, since it is larger than the sum of its proper divisors (1511023).

1330434221 is an equidigital number, since it uses as much as digits as its factorization.

1330434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511022.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1330434221 is about 36475.1178339426. The cubic root of 1330434221 is about 1099.8441159268.

Adding to 1330434221 its reverse (1224340331), we get a palindrome (2554774552).

The spelling of 1330434221 in words is "one billion, three hundred thirty million, four hundred thirty-four thousand, two hundred twenty-one".