321200313012 has 72 divisors (see below), whose sum is σ = 814221338112. Its totient is φ = 106764134400.

The previous prime is 321200312981. The next prime is 321200313043. The reversal of 321200313012 is 210313002123.

321200313012 is a `hidden beast` number, since 321 + 20 + 0 + 313 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (321200312981) and next prime (321200313043).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19075437 + ... + 19092267.

It is an arithmetic number, because the mean of its divisors is an integer number (11308629696).

Almost surely, 2^321200313012 is an apocalyptic number.

It is an amenable number.

321200313012 is an abundant number, since it is smaller than the sum of its proper divisors (493021025100).

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

321200313012 is a wasteful number, since it uses less digits than its factorization.

321200313012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18309 (or 18304 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 321200313012 its reverse (210313002123), we get a palindrome (531513315135).

The spelling of 321200313012 in words is "three hundred twenty-one billion, two hundred million, three hundred thirteen thousand, twelve".