31113113230321 has 4 divisors (see below), whose sum is σ = 31191483793012. Its totient is φ = 31034742667632.

The previous prime is 31113113230319. The next prime is 31113113230361. The reversal of 31113113230321 is 12303231131113.

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 8437078762225 + 22676034468096 = 2904665^2 + 4761936^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113113230321 - 2¹ = 31113113230319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31113113230361) 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, 39185280750 + ... + 39185281543.

It is an arithmetic number, because the mean of its divisors is an integer number (7797870948253).

Almost surely, 2^{31113113230321} is an apocalyptic number.

It is an amenable number.

31113113230321 is a deficient number, since it is larger than the sum of its proper divisors (78370562691).

31113113230321 is an equidigital number, since it uses as much as digits as its factorization.

31113113230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78370562690.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31113113230321 its reverse (12303231131113), we get a palindrome (43416344361434).

The spelling of 31113113230321 in words is "thirty-one trillion, one hundred thirteen billion, one hundred thirteen million, two hundred thirty thousand, three hundred twenty-one".