1330401021 has 4 divisors (see below), whose sum is σ = 1773868032. Its totient is φ = 886934012.

The previous prime is 1330401019. The next prime is 1330401041. The reversal of 1330401021 is 1201040331.

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 1330401021 - 2¹ = 1330401019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330401041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221733501 + ... + 221733506.

It is an arithmetic number, because the mean of its divisors is an integer number (443467008).

Almost surely, 2^1330401021 is an apocalyptic number.

It is an amenable number.

1330401021 is a deficient number, since it is larger than the sum of its proper divisors (443467011).

1330401021 is an equidigital number, since it uses as much as digits as its factorization.

1330401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443467010.

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

The square root of 1330401021 is about 36474.6627263365. The cubic root of 1330401021 is about 1099.8349672524.

Adding to 1330401021 its reverse (1201040331), we get a palindrome (2531441352).

The spelling of 1330401021 in words is "one billion, three hundred thirty million, four hundred one thousand, twenty-one".