31312123011243 has 12 divisors (see below), whose sum is σ = 45248210127120. Its totient is φ = 20865708058896.

The previous prime is 31312123011217. The next prime is 31312123011251. The reversal of 31312123011243 is 34211032121313.

31312123011243 is a `hidden beast` number, since 3 + 1 + 312 + 1 + 2 + 301 + 1 + 2 + 43 = 666.

It is not a de Polignac number, because 31312123011243 - 2¹⁰ = 31312123010219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31312123011943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753362671 + ... + 753404232.

It is an arithmetic number, because the mean of its divisors is an integer number (3770684177260).

Almost surely, 2^{31312123011243} is an apocalyptic number.

31312123011243 is a deficient number, since it is larger than the sum of its proper divisors (13936087115877).

31312123011243 is a wasteful number, since it uses less digits than its factorization.

31312123011243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506769218 (or 1506769215 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 31312123011243 its reverse (34211032121313), we get a palindrome (65523155132556).

The spelling of 31312123011243 in words is "thirty-one trillion, three hundred twelve billion, one hundred twenty-three million, eleven thousand, two hundred forty-three".