40431124421 has 2 divisors, whose sum is σ = 40431124422. Its totient is φ = 40431124420.

The previous prime is 40431124399. The next prime is 40431124439. The reversal of 40431124421 is 12442113404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30175511521 + 10255612900 = 173711^2 + 101270^2 .

It is a cyclic number.

It is not a de Polignac number, because 40431124421 - 2¹⁴ = 40431108037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40431124121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215562210 + 20215562211.

It is an arithmetic number, because the mean of its divisors is an integer number (20215562211).

Almost surely, 2^40431124421 is an apocalyptic number.

It is an amenable number.

40431124421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431124421 is an equidigital number, since it uses as much as digits as its factorization.

40431124421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 40431124421 its reverse (12442113404), we get a palindrome (52873237825).

The spelling of 40431124421 in words is "forty billion, four hundred thirty-one million, one hundred twenty-four thousand, four hundred twenty-one".