31212103112012 has 12 divisors (see below), whose sum is σ = 54675100670736. Its totient is φ = 15590645777520.

The previous prime is 31212103111979. The next prime is 31212103112041. The reversal of 31212103112012 is 21021130121213.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3851440064 + ... + 3851448167.

It is an arithmetic number, because the mean of its divisors is an integer number (4556258389228).

Almost surely, 2^{31212103112012} is an apocalyptic number.

It is an amenable number.

31212103112012 is a deficient number, since it is larger than the sum of its proper divisors (23462997558724).

31212103112012 is a wasteful number, since it uses less digits than its factorization.

31212103112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7702889248 (or 7702889246 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31212103112012 its reverse (21021130121213), we get a palindrome (52233233233225).

The spelling of 31212103112012 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred twelve thousand, twelve".