1013431343321 has 4 divisors (see below), whose sum is σ = 1013472402612. Its totient is φ = 1013390284032.

The previous prime is 1013431343299. The next prime is 1013431343333. The reversal of 1013431343321 is 1233431343101.

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 623476056025 + 389955287296 = 789605^2 + 624464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013431343321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013431343381) 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, 20492600 + ... + 20541993.

It is an arithmetic number, because the mean of its divisors is an integer number (253368100653).

Almost surely, 2^{1013431343321} is an apocalyptic number.

It is an amenable number.

1013431343321 is a deficient number, since it is larger than the sum of its proper divisors (41059291).

1013431343321 is an equidigital number, since it uses as much as digits as its factorization.

1013431343321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41059290.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 1013431343321 its reverse (1233431343101), we get a palindrome (2246862686422).

The spelling of 1013431343321 in words is "one trillion, thirteen billion, four hundred thirty-one million, three hundred forty-three thousand, three hundred twenty-one".