1321013010443 has 16 divisors (see below), whose sum is σ = 1582518153216. Its totient is φ = 1078989629760.

The previous prime is 1321013010419. The next prime is 1321013010491. The reversal of 1321013010443 is 3440103101231.

It is not a de Polignac number, because 1321013010443 - 2⁶ = 1321013010379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321013018443) 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, 53508971 + ... + 53533652.

It is an arithmetic number, because the mean of its divisors is an integer number (98907384576).

Almost surely, 2^{1321013010443} is an apocalyptic number.

1321013010443 is a deficient number, since it is larger than the sum of its proper divisors (261505142773).

1321013010443 is a wasteful number, since it uses less digits than its factorization.

1321013010443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107042714.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321013010443 its reverse (3440103101231), we get a palindrome (4761116111674).

The spelling of 1321013010443 in words is "one trillion, three hundred twenty-one billion, thirteen million, ten thousand, four hundred forty-three".