312112212221320 has 64 divisors (see below), whose sum is σ = 802584969333120. Its totient is φ = 107008473421824.

The previous prime is 312112212221207. The next prime is 312112212221323. The reversal of 312112212221320 is 23122212211213.

It is a super-3 number, since 3×312112212221320³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (312112212221323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13691064 + ... + 28489816.

It is an arithmetic number, because the mean of its divisors is an integer number (12540390145830).

Almost surely, 2^{312112212221320} is an apocalyptic number.

It is an amenable number.

312112212221320 is an abundant number, since it is smaller than the sum of its proper divisors (490472757111800).

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

312112212221320 is a wasteful number, since it uses less digits than its factorization.

312112212221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14874094 (or 14874090 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 312112212221320 its reverse (23122212211213), we get a palindrome (335234424432533).

The spelling of 312112212221320 in words is "three hundred twelve trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twenty".