321300021987 has 48 divisors (see below), whose sum is σ = 577568160000. Its totient is φ = 167939013312.

The previous prime is 321300021961. The next prime is 321300021989. The reversal of 321300021987 is 789120003123.

321300021987 is a `hidden beast` number, since 321 + 300 + 0 + 21 + 9 + 8 + 7 = 666.

It is not a de Polignac number, because 321300021987 - 2⁶ = 321300021923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321300021989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4593237 + ... + 4662662.

It is an arithmetic number, because the mean of its divisors is an integer number (12032670000).

Almost surely, 2^321300021987 is an apocalyptic number.

321300021987 is a deficient number, since it is larger than the sum of its proper divisors (256268138013).

321300021987 is a wasteful number, since it uses less digits than its factorization.

321300021987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9255960 (or 9255957 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 321300021987 in words is "three hundred twenty-one billion, three hundred million, twenty-one thousand, nine hundred eighty-seven".