231020122313 has 4 divisors (see below), whose sum is σ = 231024037140. Its totient is φ = 231016207488.

The previous prime is 231020122283. The next prime is 231020122321. The reversal of 231020122313 is 313221020132.

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 12564840649 + 218455281664 = 112093^2 + 467392^2 .

It is a cyclic number.

It is not a de Polignac number, because 231020122313 - 2¹⁶ = 231020056777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231020122213) 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, 1867520 + ... + 1987377.

It is an arithmetic number, because the mean of its divisors is an integer number (57756009285).

Almost surely, 2^231020122313 is an apocalyptic number.

It is an amenable number.

231020122313 is a deficient number, since it is larger than the sum of its proper divisors (3914827).

231020122313 is an equidigital number, since it uses as much as digits as its factorization.

231020122313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914826.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231020122313 its reverse (313221020132), we get a palindrome (544241142445).

The spelling of 231020122313 in words is "two hundred thirty-one billion, twenty million, one hundred twenty-two thousand, three hundred thirteen".