1031330213321 has 4 divisors (see below), whose sum is σ = 1034583621252. Its totient is φ = 1028076805392.

The previous prime is 1031330213299. The next prime is 1031330213339. The reversal of 1031330213321 is 1233120331301.

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 577410015625 + 453920197696 = 759875^2 + 673736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031330213321 - 2¹⁸ = 1031329951177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031330213351) 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, 1626703490 + ... + 1626704123.

It is an arithmetic number, because the mean of its divisors is an integer number (258645905313).

Almost surely, 2^{1031330213321} is an apocalyptic number.

It is an amenable number.

1031330213321 is a deficient number, since it is larger than the sum of its proper divisors (3253407931).

1031330213321 is an equidigital number, since it uses as much as digits as its factorization.

1031330213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3253407930.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1031330213321 its reverse (1233120331301), we get a palindrome (2264450544622).

The spelling of 1031330213321 in words is "one trillion, thirty-one billion, three hundred thirty million, two hundred thirteen thousand, three hundred twenty-one".