231321013003 has 4 divisors (see below), whose sum is σ = 231636594928. Its totient is φ = 231005431080.

The previous prime is 231321012947. The next prime is 231321013013. The reversal of 231321013003 is 300310123132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231321013003 - 2¹⁷ = 231320881931 is a prime.

It is a super-2 number, since 2×231321013003² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231321013013) 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, 157789863 + ... + 157791328.

It is an arithmetic number, because the mean of its divisors is an integer number (57909148732).

Almost surely, 2^231321013003 is an apocalyptic number.

231321013003 is a deficient number, since it is larger than the sum of its proper divisors (315581925).

231321013003 is an equidigital number, since it uses as much as digits as its factorization.

231321013003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315581924.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 231321013003 its reverse (300310123132), we get a palindrome (531631136135).

The spelling of 231321013003 in words is "two hundred thirty-one billion, three hundred twenty-one million, thirteen thousand, three".