321123204420401 has 4 divisors (see below), whose sum is σ = 321123295762212. Its totient is φ = 321123113078592.

The previous prime is 321123204420373. The next prime is 321123204420419. The reversal of 321123204420401 is 104024402321123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70016713024801 + 251106491395600 = 8367599^2 + 15846340^2 .

It is a cyclic number.

It is not a de Polignac number, because 321123204420401 - 2³⁸ = 320848326513457 is a prime.

It is a super-2 number, since 2×321123204420401² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321123204720401) 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, 40177196 + ... + 47502141.

It is an arithmetic number, because the mean of its divisors is an integer number (80280823940553).

Almost surely, 2^{321123204420401} is an apocalyptic number.

It is an amenable number.

321123204420401 is a deficient number, since it is larger than the sum of its proper divisors (91341811).

321123204420401 is an equidigital number, since it uses as much as digits as its factorization.

321123204420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91341810.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 321123204420401 its reverse (104024402321123), we get a palindrome (425147606741524).

The spelling of 321123204420401 in words is "three hundred twenty-one trillion, one hundred twenty-three billion, two hundred four million, four hundred twenty thousand, four hundred one".