31231321103013 has 8 divisors (see below), whose sum is σ = 41897232400608. Its totient is φ = 20693145270384.

The previous prime is 31231321102987. The next prime is 31231321103039. The reversal of 31231321103013 is 31030112313213.

It is an interprime number because it is at equal distance from previous prime (31231321102987) and next prime (31231321103039).

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

It is not a de Polignac number, because 31231321103013 - 2¹⁰ = 31231321101989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231321103063) 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, 31933865670 + ... + 31933866647.

It is an arithmetic number, because the mean of its divisors is an integer number (5237154050076).

Almost surely, 2^{31231321103013} is an apocalyptic number.

It is an amenable number.

31231321103013 is a deficient number, since it is larger than the sum of its proper divisors (10665911297595).

31231321103013 is a wasteful number, since it uses less digits than its factorization.

31231321103013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63867732483.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31231321103013 its reverse (31030112313213), we get a palindrome (62261433416226).

The spelling of 31231321103013 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty-one million, one hundred three thousand, thirteen".