312130012220 has 48 divisors (see below), whose sum is σ = 743046356640. Its totient is φ = 109182318336.

The previous prime is 312130012217. The next prime is 312130012291. The reversal of 312130012220 is 22210031213.

It is a congruent number.

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, 31587167 + ... + 31597046.

It is an arithmetic number, because the mean of its divisors is an integer number (15480132430).

Almost surely, 2^312130012220 is an apocalyptic number.

It is an amenable number.

312130012220 is an abundant number, since it is smaller than the sum of its proper divisors (430916344420).

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

312130012220 is a wasteful number, since it uses less digits than its factorization.

312130012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63184254 (or 63184252 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 312130012220 its reverse (22210031213), we get a palindrome (334340043433).

The spelling of 312130012220 in words is "three hundred twelve billion, one hundred thirty million, twelve thousand, two hundred twenty".