312121330212 has 48 divisors (see below), whose sum is σ = 730305398592. Its totient is φ = 103751930880.

The previous prime is 312121330187. The next prime is 312121330223. The reversal of 312121330212 is 212033121213.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6644287 + ... + 6691097.

It is an arithmetic number, because the mean of its divisors is an integer number (15214695804).

Almost surely, 2^312121330212 is an apocalyptic number.

It is an amenable number.

312121330212 is an abundant number, since it is smaller than the sum of its proper divisors (418184068380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312121330212 is a wasteful number, since it uses less digits than its factorization.

312121330212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48348 (or 48346 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312121330212 its reverse (212033121213), we get a palindrome (524154451425).

The spelling of 312121330212 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred thirty thousand, two hundred twelve".