40121431429 has 2 divisors, whose sum is σ = 40121431430. Its totient is φ = 40121431428.

The previous prime is 40121431421. The next prime is 40121431463. The reversal of 40121431429 is 92413412104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40120891204 + 540225 = 200302^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 40121431429 - 2³ = 40121431421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40121431429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40121431421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060715714 + 20060715715.

It is an arithmetic number, because the mean of its divisors is an integer number (20060715715).

Almost surely, 2^40121431429 is an apocalyptic number.

It is an amenable number.

40121431429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40121431429 is an equidigital number, since it uses as much as digits as its factorization.

40121431429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 40121431429 in words is "forty billion, one hundred twenty-one million, four hundred thirty-one thousand, four hundred twenty-nine".