40320200121 has 4 divisors (see below), whose sum is σ = 53760266832. Its totient is φ = 26880133412.

The previous prime is 40320200099. The next prime is 40320200131. The reversal of 40320200121 is 12100202304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40320200121 - 2⁹ = 40320199609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40320200121.

It is not an unprimeable number, because it can be changed into a prime (40320200131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6720033351 + ... + 6720033356.

It is an arithmetic number, because the mean of its divisors is an integer number (13440066708).

Almost surely, 2^40320200121 is an apocalyptic number.

It is an amenable number.

40320200121 is a deficient number, since it is larger than the sum of its proper divisors (13440066711).

40320200121 is a wasteful number, since it uses less digits than its factorization.

40320200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13440066710.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 40320200121 its reverse (12100202304), we get a palindrome (52420402425).

The spelling of 40320200121 in words is "forty billion, three hundred twenty million, two hundred thousand, one hundred twenty-one".