1330331000021 has 4 divisors (see below), whose sum is σ = 1334278570092. Its totient is φ = 1326383429952.

The previous prime is 1330330999981. The next prime is 1330331000027. The reversal of 1330331000021 is 1200001330331.

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 270697521796 + 1059633478225 = 520286^2 + 1029385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330331000021 - 2¹⁴ = 1330330983637 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 (1330331000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1973784530 + ... + 1973785203.

It is an arithmetic number, because the mean of its divisors is an integer number (333569642523).

Almost surely, 2^{1330331000021} is an apocalyptic number.

It is an amenable number.

1330331000021 is a deficient number, since it is larger than the sum of its proper divisors (3947570071).

1330331000021 is an equidigital number, since it uses as much as digits as its factorization.

1330331000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947570070.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 1330331000021 its reverse (1200001330331), we get a palindrome (2530332330352).

The spelling of 1330331000021 in words is "one trillion, three hundred thirty billion, three hundred thirty-one million, twenty-one", and thus it is an aban number.