1321131343353 has 32 divisors (see below), whose sum is σ = 1827524697600. Its totient is φ = 848482753536.

The previous prime is 1321131343303. The next prime is 1321131343369. The reversal of 1321131343353 is 3533431311231.

It is a happy number.

It is not a de Polignac number, because 1321131343353 - 2¹⁴ = 1321131326969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321131343303) 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 31 ways as a sum of consecutive naturals, for example, 2000178 + ... + 2577396.

It is an arithmetic number, because the mean of its divisors is an integer number (57110146800).

Almost surely, 2^{1321131343353} is an apocalyptic number.

It is an amenable number.

1321131343353 is a deficient number, since it is larger than the sum of its proper divisors (506393354247).

1321131343353 is a wasteful number, since it uses less digits than its factorization.

1321131343353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577541.

The product of its digits is 29160, while the sum is 33.

Adding to 1321131343353 its reverse (3533431311231), we get a palindrome (4854562654584).

The spelling of 1321131343353 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-one million, three hundred forty-three thousand, three hundred fifty-three".