321200312120 has 32 divisors (see below), whose sum is σ = 723105284400. Its totient is φ = 128408199168.

The previous prime is 321200312117. The next prime is 321200312123. The reversal of 321200312120 is 21213002123.

It is an interprime number because it is at equal distance from previous prime (321200312117) and next prime (321200312123).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321200312123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2175305 + ... + 2318264.

Almost surely, 2^321200312120 is an apocalyptic number.

It is an amenable number.

321200312120 is an abundant number, since it is smaller than the sum of its proper divisors (401904972280).

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

321200312120 is a wasteful number, since it uses less digits than its factorization.

321200312120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495367 (or 4495363 counting only the distinct ones).

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

Adding to 321200312120 its reverse (21213002123), we get a palindrome (342413314243).

The spelling of 321200312120 in words is "three hundred twenty-one billion, two hundred million, three hundred twelve thousand, one hundred twenty".