40320124421 has 4 divisors (see below), whose sum is σ = 40376203200. Its totient is φ = 40264045644.

The previous prime is 40320124399. The next prime is 40320124531. The reversal of 40320124421 is 12442102304.

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 40320124421 - 2¹⁰ = 40320123397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40320124121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28038311 + ... + 28039748.

It is an arithmetic number, because the mean of its divisors is an integer number (10094050800).

Almost surely, 2^40320124421 is an apocalyptic number.

It is an amenable number.

40320124421 is a deficient number, since it is larger than the sum of its proper divisors (56078779).

40320124421 is an equidigital number, since it uses as much as digits as its factorization.

40320124421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56078778.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 40320124421 its reverse (12442102304), we get a palindrome (52762226725).

The spelling of 40320124421 in words is "forty billion, three hundred twenty million, one hundred twenty-four thousand, four hundred twenty-one".