321223322138 has 8 divisors (see below), whose sum is σ = 481850715060. Its totient is φ = 160606417120.

The previous prime is 321223322137. The next prime is 321223322159. The reversal of 321223322138 is 831223322123.

It can be written as a sum of positive squares in 2 ways, for example, as 285586566409 + 35636755729 = 534403^2 + 188777^2 .

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

It is a super-3 number, since 3×321223322138³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321223322137) 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 3 ways as a sum of consecutive naturals, for example, 2544953 + ... + 2668188.

Almost surely, 2^321223322138 is an apocalyptic number.

321223322138 is a deficient number, since it is larger than the sum of its proper divisors (160627392922).

321223322138 is a wasteful number, since it uses less digits than its factorization.

321223322138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243952.

The product of its digits is 20736, while the sum is 32.

The spelling of 321223322138 in words is "three hundred twenty-one billion, two hundred twenty-three million, three hundred twenty-two thousand, one hundred thirty-eight".