1330122021 has 4 divisors (see below), whose sum is σ = 1773496032. Its totient is φ = 886748012.

The previous prime is 1330122011. The next prime is 1330122047. The reversal of 1330122021 is 1202210331.

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 1330122021 - 2⁷ = 1330121893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330122011) 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 3 ways as a sum of consecutive naturals, for example, 221687001 + ... + 221687006.

It is an arithmetic number, because the mean of its divisors is an integer number (443374008).

Almost surely, 2^1330122021 is an apocalyptic number.

It is an amenable number.

1330122021 is a deficient number, since it is larger than the sum of its proper divisors (443374011).

1330122021 is an equidigital number, since it uses as much as digits as its factorization.

1330122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443374010.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1330122021 is about 36470.8379530825. The cubic root of 1330122021 is about 1099.7580793057.

Adding to 1330122021 its reverse (1202210331), we get a palindrome (2532332352).

The spelling of 1330122021 in words is "one billion, three hundred thirty million, one hundred twenty-two thousand, twenty-one".