321401104040 has 128 divisors (see below), whose sum is σ = 751579171200. Its totient is φ = 123613163520.

The previous prime is 321401104027. The next prime is 321401104067. The reversal of 321401104040 is 40401104123.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35663135 + ... + 35672145.

It is an arithmetic number, because the mean of its divisors is an integer number (5871712275).

Almost surely, 2^321401104040 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 321401104040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375789585600).

321401104040 is an abundant number, since it is smaller than the sum of its proper divisors (430178067160).

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

321401104040 is a wasteful number, since it uses less digits than its factorization.

321401104040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9387 (or 9383 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 321401104040 its reverse (40401104123), we get a palindrome (361802208163).

The spelling of 321401104040 in words is "three hundred twenty-one billion, four hundred one million, one hundred four thousand, forty".