31211200312 has 16 divisors (see below), whose sum is σ = 58527549360. Its totient is φ = 15603853824.

The previous prime is 31211200289. The next prime is 31211200331. The reversal of 31211200312 is 21300211213.

It is a super-4 number, since 4×31211200312⁴ (a number of 43 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140713 + ... + 286744.

It is an arithmetic number, because the mean of its divisors is an integer number (3657971835).

Almost surely, 2^31211200312 is an apocalyptic number.

It is an amenable number.

31211200312 is a deficient number, since it is larger than the sum of its proper divisors (27316349048).

31211200312 is a wasteful number, since it uses less digits than its factorization.

31211200312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436590 (or 436586 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31211200312 its reverse (21300211213), we get a palindrome (52511411525).

The spelling of 31211200312 in words is "thirty-one billion, two hundred eleven million, two hundred thousand, three hundred twelve".