323121221989 has 16 divisors (see below), whose sum is σ = 333082731520. Its totient is φ = 313278885360.

The previous prime is 323121221977. The next prime is 323121222001. The reversal of 323121221989 is 989122121323.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (323121221977) and next prime (323121222001).

It is a cyclic number.

It is not a de Polignac number, because 323121221989 - 2³⁷ = 185682268517 is a prime.

It is a super-2 number, since 2×323121221989² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323121221909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3391684 + ... + 3485650.

It is an arithmetic number, because the mean of its divisors is an integer number (20817670720).

Almost surely, 2^323121221989 is an apocalyptic number.

It is an amenable number.

323121221989 is a deficient number, since it is larger than the sum of its proper divisors (9961509531).

323121221989 is a wasteful number, since it uses less digits than its factorization.

323121221989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94600.

The product of its digits is 93312, while the sum is 43.

The spelling of 323121221989 in words is "three hundred twenty-three billion, one hundred twenty-one million, two hundred twenty-one thousand, nine hundred eighty-nine".