40320321121 has 8 divisors (see below), whose sum is σ = 40556476800. Its totient is φ = 40084501248.

The previous prime is 40320321109. The next prime is 40320321161. The reversal of 40320321121 is 12112302304.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40320321121 - 2⁷ = 40320320993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40320321101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158940 + ... + 325426.

It is an arithmetic number, because the mean of its divisors is an integer number (5069559600).

Almost surely, 2^40320321121 is an apocalyptic number.

It is an amenable number.

40320321121 is a deficient number, since it is larger than the sum of its proper divisors (236155679).

40320321121 is a wasteful number, since it uses less digits than its factorization.

40320321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167903.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 40320321121 its reverse (12112302304), we get a palindrome (52432623425).

The spelling of 40320321121 in words is "forty billion, three hundred twenty million, three hundred twenty-one thousand, one hundred twenty-one".