40012421443 has 2 divisors, whose sum is σ = 40012421444. Its totient is φ = 40012421442.

The previous prime is 40012421437. The next prime is 40012421503. The reversal of 40012421443 is 34412421004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40012421443 - 2¹⁷ = 40012290371 is a prime.

It is not a weakly prime, because it can be changed into another prime (40012421843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20006210721 + 20006210722.

It is an arithmetic number, because the mean of its divisors is an integer number (20006210722).

Almost surely, 2^40012421443 is an apocalyptic number.

40012421443 is a deficient number, since it is larger than the sum of its proper divisors (1).

40012421443 is an equidigital number, since it uses as much as digits as its factorization.

40012421443 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 25.

Adding to 40012421443 its reverse (34412421004), we get a palindrome (74424842447).

The spelling of 40012421443 in words is "forty billion, twelve million, four hundred twenty-one thousand, four hundred forty-three".