12021030321 has 8 divisors (see below), whose sum is σ = 16267265184. Its totient is φ = 7894407840.

The previous prime is 12021030311. The next prime is 12021030389. The reversal of 12021030321 is 12303012021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12021030321 - 2¹⁷ = 12020899249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021030321.

It is not an unprimeable number, because it can be changed into a prime (12021030311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29902860 + ... + 29903261.

It is an arithmetic number, because the mean of its divisors is an integer number (2033408148).

Almost surely, 2^12021030321 is an apocalyptic number.

It is an amenable number.

12021030321 is a deficient number, since it is larger than the sum of its proper divisors (4246234863).

12021030321 is an equidigital number, since it uses as much as digits as its factorization.

12021030321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59806191.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12021030321 its reverse (12303012021), we get a palindrome (24324042342).

The spelling of 12021030321 in words is "twelve billion, twenty-one million, thirty thousand, three hundred twenty-one".