40121368723 has 2 divisors, whose sum is σ = 40121368724. Its totient is φ = 40121368722.

The previous prime is 40121368711. The next prime is 40121368747. The reversal of 40121368723 is 32786312104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40121368723 - 2⁵ = 40121368691 is a prime.

It is not a weakly prime, because it can be changed into another prime (40121365723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060684361 + 20060684362.

It is an arithmetic number, because the mean of its divisors is an integer number (20060684362).

Almost surely, 2^40121368723 is an apocalyptic number.

40121368723 is a deficient number, since it is larger than the sum of its proper divisors (1).

40121368723 is an equidigital number, since it uses as much as digits as its factorization.

40121368723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 40121368723 in words is "forty billion, one hundred twenty-one million, three hundred sixty-eight thousand, seven hundred twenty-three".