321300021000 has 128 divisors (see below), whose sum is σ = 1145664149760. Its totient is φ = 73440000000.

The previous prime is 321300020989. The next prime is 321300021043. The reversal of 321300021000 is 120003123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7629001 + ... + 7671000.

It is an arithmetic number, because the mean of its divisors is an integer number (8950501170).

Almost surely, 2^321300021000 is an apocalyptic number.

321300021000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321300021000 is an abundant number, since it is smaller than the sum of its proper divisors (824364128760).

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

321300021000 is a wasteful number, since it uses less digits than its factorization.

321300021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15300032 (or 15300018 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 321300021000 its reverse (120003123), we get a palindrome (321420024123).

The spelling of 321300021000 in words is "three hundred twenty-one billion, three hundred million, twenty-one thousand".