312311201212 has 12 divisors (see below), whose sum is σ = 561316078120. Its totient is φ = 151935178896.

The previous prime is 312311201197. The next prime is 312311201233. The reversal of 312311201212 is 212102113213.

It is a super-3 number, since 3×312311201212³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312311201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055105262 + ... + 1055105557.

Almost surely, 2^312311201212 is an apocalyptic number.

It is an amenable number.

312311201212 is a deficient number, since it is larger than the sum of its proper divisors (249004876908).

312311201212 is a wasteful number, since it uses less digits than its factorization.

312311201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110210860 (or 2110210858 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312311201212 its reverse (212102113213), we get a palindrome (524413314425).

The spelling of 312311201212 in words is "three hundred twelve billion, three hundred eleven million, two hundred one thousand, two hundred twelve".