31311012103297 has 4 divisors (see below), whose sum is σ = 31311023302980. Its totient is φ = 31311000903616.

The previous prime is 31311012103289. The next prime is 31311012103333. The reversal of 31311012103297 is 79230121011313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28071357694081 + 3239654409216 = 5298241^2 + 1799904^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311012103297 - 2³ = 31311012103289 is a prime.

It is a super-2 number, since 2×31311012103297² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311012103897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2474013 + ... + 8291125.

It is an arithmetic number, because the mean of its divisors is an integer number (7827755825745).

Almost surely, 2^{31311012103297} is an apocalyptic number.

It is an amenable number.

31311012103297 is a deficient number, since it is larger than the sum of its proper divisors (11199683).

31311012103297 is an equidigital number, since it uses as much as digits as its factorization.

31311012103297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11199682.

The product of its (nonzero) digits is 6804, while the sum is 34.

The spelling of 31311012103297 in words is "thirty-one trillion, three hundred eleven billion, twelve million, one hundred three thousand, two hundred ninety-seven".