12021302321320 has 32 divisors (see below), whose sum is σ = 27048176437320. Its totient is φ = 4808477157120.

The previous prime is 12021302321317. The next prime is 12021302321359. The reversal of 12021302321320 is 2312320312021.

It can be written as a sum of positive squares in 4 ways, for example, as 10330194539844 + 1691107781476 = 3214062^2 + 1300426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12021302321291 and 12021302321300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3275914 + ... + 5896966.

Almost surely, 2^{12021302321320} is an apocalyptic number.

12021302321320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021302321320 is an abundant number, since it is smaller than the sum of its proper divisors (15026874116000).

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

12021302321320 is a wasteful number, since it uses less digits than its factorization.

12021302321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735725 (or 2735721 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 12021302321320 its reverse (2312320312021), we get a palindrome (14333622633341).

The spelling of 12021302321320 in words is "twelve trillion, twenty-one billion, three hundred two million, three hundred twenty-one thousand, three hundred twenty".