40121129 has 2 divisors, whose sum is σ = 40121130. Its totient is φ = 40121128.

The previous prime is 40121119. The next prime is 40121149. The reversal of 40121129 is 92112104.

It is an a-pointer prime, because the next prime (40121149) can be obtained adding 40121129 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38775529 + 1345600 = 6227^2 + 1160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40121129 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40121129.

It is not a weakly prime, because it can be changed into another prime (40121119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060564 + 20060565.

It is an arithmetic number, because the mean of its divisors is an integer number (20060565).

Almost surely, 2^40121129 is an apocalyptic number.

It is an amenable number.

40121129 is a deficient number, since it is larger than the sum of its proper divisors (1).

40121129 is an equidigital number, since it uses as much as digits as its factorization.

40121129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 40121129 is about 6334.1241699228. The cubic root of 40121129 is about 342.3400542538.

The spelling of 40121129 in words is "forty million, one hundred twenty-one thousand, one hundred twenty-nine".