40012421387 has 2 divisors, whose sum is σ = 40012421388. Its totient is φ = 40012421386.

The previous prime is 40012421363. The next prime is 40012421437. The reversal of 40012421387 is 78312421004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40012421387 - 2⁸ = 40012421131 is a prime.

It is not a weakly prime, because it can be changed into another prime (40012441387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20006210693 + 20006210694.

It is an arithmetic number, because the mean of its divisors is an integer number (20006210694).

Almost surely, 2^40012421387 is an apocalyptic number.

40012421387 is a deficient number, since it is larger than the sum of its proper divisors (1).

40012421387 is an equidigital number, since it uses as much as digits as its factorization.

40012421387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 40012421387 in words is "forty billion, twelve million, four hundred twenty-one thousand, three hundred eighty-seven".