321002240220221 has 4 divisors (see below), whose sum is σ = 366859703108832. Its totient is φ = 275144777331612.

The previous prime is 321002240220199. The next prime is 321002240220287. The reversal of 321002240220221 is 122022042200123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321002240220221 - 2¹⁴ = 321002240203837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321002240220421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22928731444295 + ... + 22928731444308.

It is an arithmetic number, because the mean of its divisors is an integer number (91714925777208).

Almost surely, 2^{321002240220221} is an apocalyptic number.

It is an amenable number.

321002240220221 is a deficient number, since it is larger than the sum of its proper divisors (45857462888611).

321002240220221 is an equidigital number, since it uses as much as digits as its factorization.

321002240220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45857462888610.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 321002240220221 its reverse (122022042200123), we get a palindrome (443024282420344).

The spelling of 321002240220221 in words is "three hundred twenty-one trillion, two billion, two hundred forty million, two hundred twenty thousand, two hundred twenty-one".