1321013313133 has 4 divisors (see below), whose sum is σ = 1342669269148. Its totient is φ = 1299357357120.

The previous prime is 1321013313127. The next prime is 1321013313149. The reversal of 1321013313133 is 3313133101231.

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 87854145604 + 1233159167529 = 296402^2 + 1110477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321013313133 - 2¹⁷ = 1321013182061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321013313098 and 1321013313107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321013353133) 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, 10827977916 + ... + 10827978037.

It is an arithmetic number, because the mean of its divisors is an integer number (335667317287).

Almost surely, 2^{1321013313133} is an apocalyptic number.

It is an amenable number.

1321013313133 is a deficient number, since it is larger than the sum of its proper divisors (21655956015).

1321013313133 is an equidigital number, since it uses as much as digits as its factorization.

1321013313133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21655956014.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 1321013313133 its reverse (3313133101231), we get a palindrome (4634146414364).

The spelling of 1321013313133 in words is "one trillion, three hundred twenty-one billion, thirteen million, three hundred thirteen thousand, one hundred thirty-three".