31031321210013 has 8 divisors (see below), whose sum is σ = 42337306457248. Its totient is φ = 20206441718064.

The previous prime is 31031321209991. The next prime is 31031321210059. The reversal of 31031321210013 is 31001212313013.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31031321210013 - 2⁵ = 31031321209981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031321210063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120276438670 + ... + 120276438927.

It is an arithmetic number, because the mean of its divisors is an integer number (5292163307156).

Almost surely, 2^{31031321210013} is an apocalyptic number.

It is an amenable number.

31031321210013 is a deficient number, since it is larger than the sum of its proper divisors (11305985247235).

31031321210013 is a wasteful number, since it uses less digits than its factorization.

31031321210013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240552877643.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31031321210013 its reverse (31001212313013), we get a palindrome (62032533523026).

The spelling of 31031321210013 in words is "thirty-one trillion, thirty-one billion, three hundred twenty-one million, two hundred ten thousand, thirteen".