31030311212 has 12 divisors (see below), whose sum is σ = 54783603336. Its totient is φ = 15377853120.

The previous prime is 31030311209. The next prime is 31030311233. The reversal of 31030311212 is 21211303013.

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, 34325114 + ... + 34326017.

It is an arithmetic number, because the mean of its divisors is an integer number (4565300278).

Almost surely, 2^31030311212 is an apocalyptic number.

It is an amenable number.

31030311212 is a deficient number, since it is larger than the sum of its proper divisors (23753292124).

31030311212 is a wasteful number, since it uses less digits than its factorization.

31030311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68651248 (or 68651246 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31030311212 its reverse (21211303013), we get a palindrome (52241614225).

The spelling of 31030311212 in words is "thirty-one billion, thirty million, three hundred eleven thousand, two hundred twelve".