1013231321321 has 4 divisors (see below), whose sum is σ = 1013248550544. Its totient is φ = 1013214092100.

The previous prime is 1013231321279. The next prime is 1013231321369. The reversal of 1013231321321 is 1231231323101.

1013231321321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1013231321321 - 2³⁸ = 738353414377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013231321371) 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, 8526095 + ... + 8644116.

It is an arithmetic number, because the mean of its divisors is an integer number (253312137636).

Almost surely, 2^{1013231321321} is an apocalyptic number.

It is an amenable number.

1013231321321 is a deficient number, since it is larger than the sum of its proper divisors (17229223).

1013231321321 is an equidigital number, since it uses as much as digits as its factorization.

1013231321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17229222.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1013231321321 its reverse (1231231323101), we get a palindrome (2244462644422).

The spelling of 1013231321321 in words is "one trillion, thirteen billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred twenty-one".