31012320210023 has 4 divisors (see below), whose sum is σ = 31768718263968. Its totient is φ = 30255922156080.

The previous prime is 31012320209993. The next prime is 31012320210037. The reversal of 31012320210023 is 32001202321013.

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

It is not a de Polignac number, because 31012320210023 - 2¹⁸ = 31012319947879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31012320209977 and 31012320210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012320210623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378199026911 + ... + 378199026992.

It is an arithmetic number, because the mean of its divisors is an integer number (7942179565992).

Almost surely, 2^{31012320210023} is an apocalyptic number.

31012320210023 is a deficient number, since it is larger than the sum of its proper divisors (756398053945).

31012320210023 is an equidigital number, since it uses as much as digits as its factorization.

31012320210023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756398053944.

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

Adding to 31012320210023 its reverse (32001202321013), we get a palindrome (63013522531036).

The spelling of 31012320210023 in words is "thirty-one trillion, twelve billion, three hundred twenty million, two hundred ten thousand, twenty-three".