321240111423400 has 192 divisors, whose sum is σ = 819549779050800. Its totient is φ = 116368406568960.

The previous prime is 321240111423377. The next prime is 321240111423403. The reversal of 321240111423400 is 4324111042123.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 38371324996 + 321201740098404 = 195886^2 + 17922102^2 .

It is not an unprimeable number, because it can be changed into a prime (321240111423403) 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 in 47 ways as a sum of consecutive naturals, for example, 4146225462 + ... + 4146302938.

Almost surely, 2^{321240111423400} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321240111423400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409774889525400).

321240111423400 is an abundant number, since it is smaller than the sum of its proper divisors (498309667627400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321240111423400 is a wasteful number, since it uses less digits than its factorization.

321240111423400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107648 (or 107639 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 321240111423400 its reverse (4324111042123), we get a palindrome (325564222465523).

The spelling of 321240111423400 in words is "three hundred twenty-one trillion, two hundred forty billion, one hundred eleven million, four hundred twenty-three thousand, four hundred".