312212123012 has 12 divisors (see below), whose sum is σ = 547633045596. Its totient is φ = 155745538560.

The previous prime is 312212122991. The next prime is 312212123023. The reversal of 312212123012 is 210321212213.

It can be written as a sum of positive squares in 2 ways, for example, as 50491887616 + 261720235396 = 224704^2 + 511586^2 .

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, 90128789 + ... + 90132252.

It is an arithmetic number, because the mean of its divisors is an integer number (45636087133).

Almost surely, 2^312212123012 is an apocalyptic number.

It is an amenable number.

312212123012 is a deficient number, since it is larger than the sum of its proper divisors (235420922584).

312212123012 is a wasteful number, since it uses less digits than its factorization.

312212123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180261478 (or 180261476 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 312212123012 its reverse (210321212213), we get a palindrome (522533335225).

The spelling of 312212123012 in words is "three hundred twelve billion, two hundred twelve million, one hundred twenty-three thousand, twelve".