331221223000021 has 8 divisors (see below), whose sum is σ = 331445559519360. Its totient is φ = 330996888623328.

The previous prime is 331221222999971. The next prime is 331221223000043. The reversal of 331221223000021 is 120000322122133.

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

It is a cyclic number.

It is not a de Polignac number, because 331221223000021 - 2⁷ = 331221222999893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331221222999956 and 331221223000001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331221223000051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420634345 + ... + 421421041.

It is an arithmetic number, because the mean of its divisors is an integer number (41430694939920).

Almost surely, 2^{331221223000021} is an apocalyptic number.

It is an amenable number.

331221223000021 is a deficient number, since it is larger than the sum of its proper divisors (224336519339).

331221223000021 is a wasteful number, since it uses less digits than its factorization.

331221223000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071323.

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

Adding to 331221223000021 its reverse (120000322122133), we get a palindrome (451221545122154).

The spelling of 331221223000021 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-one", and thus it is an aban number.