321220121021099 has 2 divisors, whose sum is σ = 321220121021100. Its totient is φ = 321220121021098.

The previous prime is 321220121021047. The next prime is 321220121021161. The reversal of 321220121021099 is 990120121022123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321220121021099 - 2⁴⁴ = 303627934976683 is a prime.

It is a super-2 number, since 2×321220121021099² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321220111021099) by changing a digit.

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 as a sum of consecutive naturals, namely, 160610060510549 + 160610060510550.

It is an arithmetic number, because the mean of its divisors is an integer number (160610060510550).

Almost surely, 2^{321220121021099} is an apocalyptic number.

321220121021099 is a deficient number, since it is larger than the sum of its proper divisors (1).

321220121021099 is an equidigital number, since it uses as much as digits as its factorization.

321220121021099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 321220121021099 in words is "three hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, ninety-nine".