312321000220 has 24 divisors (see below), whose sum is σ = 690393790800. Its totient is φ = 118353220992.

The previous prime is 312321000209. The next prime is 312321000223. The reversal of 312321000220 is 22000123213.

It is a junction number, because it is equal to n+sod(n) for n = 312321000194 and 312321000203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312321000223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 410948305 + ... + 410949064.

It is an arithmetic number, because the mean of its divisors is an integer number (28766407950).

Almost surely, 2^312321000220 is an apocalyptic number.

It is an amenable number.

312321000220 is an abundant number, since it is smaller than the sum of its proper divisors (378072790580).

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

312321000220 is a wasteful number, since it uses less digits than its factorization.

312321000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821897397 (or 821897395 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 312321000220 its reverse (22000123213), we get a palindrome (334321123433).

The spelling of 312321000220 in words is "three hundred twelve billion, three hundred twenty-one million, two hundred twenty", and thus it is an aban number.