31212031302113 has 8 divisors (see below), whose sum is σ = 32385808183296. Its totient is φ = 30048687993600.

The previous prime is 31212031302073. The next prime is 31212031302157. The reversal of 31212031302113 is 31120313021213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212031302113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31212031202113) 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, 2608387073 + ... + 2608399038.

It is an arithmetic number, because the mean of its divisors is an integer number (4048226022912).

Almost surely, 2^{31212031302113} is an apocalyptic number.

It is an amenable number.

31212031302113 is a deficient number, since it is larger than the sum of its proper divisors (1173776881183).

31212031302113 is a wasteful number, since it uses less digits than its factorization.

31212031302113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216786335.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31212031302113 its reverse (31120313021213), we get a palindrome (62332344323326).

The spelling of 31212031302113 in words is "thirty-one trillion, two hundred twelve billion, thirty-one million, three hundred two thousand, one hundred thirteen".