1331321130021 has 16 divisors (see below), whose sum is σ = 1868696222400. Its totient is φ = 840755495808.

The previous prime is 1331321129917. The next prime is 1331321130023. The reversal of 1331321130021 is 1200311231331.

It is a happy number.

It is not a de Polignac number, because 1331321130021 - 2⁷ = 1331321129893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331321130021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331321130023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480096 + ... + 1700921.

It is an arithmetic number, because the mean of its divisors is an integer number (116793513900).

Almost surely, 2^{1331321130021} is an apocalyptic number.

It is an amenable number.

1331321130021 is a deficient number, since it is larger than the sum of its proper divisors (537375092379).

1331321130021 is a wasteful number, since it uses less digits than its factorization.

1331321130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191748.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1331321130021 its reverse (1200311231331), we get a palindrome (2531632361352).

The spelling of 1331321130021 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-one million, one hundred thirty thousand, twenty-one".