1330221310021 has 4 divisors (see below), whose sum is σ = 1331841556044. Its totient is φ = 1328601064000.

The previous prime is 1330221309997. The next prime is 1330221310027. The reversal of 1330221310021 is 1200131220331.

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 853334385121 + 476886924900 = 923761^2 + 690570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330221310021 - 2⁹ = 1330221309509 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 (1330221310027) 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, 810121780 + ... + 810123421.

It is an arithmetic number, because the mean of its divisors is an integer number (332960389011).

Almost surely, 2^{1330221310021} is an apocalyptic number.

It is an amenable number.

1330221310021 is a deficient number, since it is larger than the sum of its proper divisors (1620246023).

1330221310021 is an equidigital number, since it uses as much as digits as its factorization.

1330221310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620246022.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1330221310021 its reverse (1200131220331), we get a palindrome (2530352530352).

The spelling of 1330221310021 in words is "one trillion, three hundred thirty billion, two hundred twenty-one million, three hundred ten thousand, twenty-one".