31212311112306 has 48 divisors (see below), whose sum is σ = 70168493959200. Its totient is φ = 10398595667328.

The previous prime is 31212311112299. The next prime is 31212311112317. The reversal of 31212311112306 is 60321111321213.

31212311112306 is a `hidden beast` number, since 3 + 1 + 212 + 31 + 1 + 112 + 306 = 666.

It is a super-2 number, since 2×31212311112306² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 31212311112306.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16081116 + ... + 17917223.

It is an arithmetic number, because the mean of its divisors is an integer number (1461843624150).

Almost surely, 2^{31212311112306} is an apocalyptic number.

31212311112306 is an abundant number, since it is smaller than the sum of its proper divisors (38956182846894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31212311112306 is a wasteful number, since it uses less digits than its factorization.

31212311112306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34000245 (or 34000233 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

Adding to 31212311112306 its reverse (60321111321213), we get a palindrome (91533422433519).

The spelling of 31212311112306 in words is "thirty-one trillion, two hundred twelve billion, three hundred eleven million, one hundred twelve thousand, three hundred six".