40320021121 has 8 divisors (see below), whose sum is σ = 40820732064. Its totient is φ = 39819665760.

The previous prime is 40320021061. The next prime is 40320021139. The reversal of 40320021121 is 12112002304.

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 40320021121 - 2¹⁷ = 40319890049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40320021095 and 40320021104.

It is not an unprimeable number, because it can be changed into a prime (40320031121) 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, 143026 + ... + 317956.

It is an arithmetic number, because the mean of its divisors is an integer number (5102591508).

Almost surely, 2^40320021121 is an apocalyptic number.

It is an amenable number.

40320021121 is a deficient number, since it is larger than the sum of its proper divisors (500710943).

40320021121 is a wasteful number, since it uses less digits than its factorization.

40320021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177791.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 40320021121 its reverse (12112002304), we get a palindrome (52432023425).

The spelling of 40320021121 in words is "forty billion, three hundred twenty million, twenty-one thousand, one hundred twenty-one".