321013019989 has 2 divisors, whose sum is σ = 321013019990. Its totient is φ = 321013019988.

The previous prime is 321013019927. The next prime is 321013020017. The reversal of 321013019989 is 989910310123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263692520100 + 57320499889 = 513510^2 + 239417^2 .

It is a cyclic number.

It is not a de Polignac number, because 321013019989 - 2¹⁵ = 321012987221 is a prime.

It is a super-2 number, since 2×321013019989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321013019909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160506509994 + 160506509995.

It is an arithmetic number, because the mean of its divisors is an integer number (160506509995).

Almost surely, 2^321013019989 is an apocalyptic number.

It is an amenable number.

321013019989 is a deficient number, since it is larger than the sum of its proper divisors (1).

321013019989 is an equidigital number, since it uses as much as digits as its factorization.

321013019989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 321013019989 in words is "three hundred twenty-one billion, thirteen million, nineteen thousand, nine hundred eighty-nine".