40122020142509 has 2 divisors, whose sum is σ = 40122020142510. Its totient is φ = 40122020142508.

The previous prime is 40122020142493. The next prime is 40122020142553. The reversal of 40122020142509 is 90524102022104.

40122020142509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40121456222500 + 563920009 = 6334150^2 + 23747^2 .

It is a cyclic number.

It is not a de Polignac number, because 40122020142509 - 2⁴ = 40122020142493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40122020142409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20061010071254 + 20061010071255.

It is an arithmetic number, because the mean of its divisors is an integer number (20061010071255).

Almost surely, 2^{40122020142509} is an apocalyptic number.

It is an amenable number.

40122020142509 is a deficient number, since it is larger than the sum of its proper divisors (1).

40122020142509 is an equidigital number, since it uses as much as digits as its factorization.

40122020142509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 40122020142509 in words is "forty trillion, one hundred twenty-two billion, twenty million, one hundred forty-two thousand, five hundred nine".