40121043269 has 2 divisors, whose sum is σ = 40121043270. Its totient is φ = 40121043268.

The previous prime is 40121043217. The next prime is 40121043289. The reversal of 40121043269 is 96234012104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31348473025 + 8772570244 = 177055^2 + 93662^2 .

It is a cyclic number.

It is not a de Polignac number, because 40121043269 - 2⁸ = 40121043013 is a prime.

It is a super-2 number, since 2×40121043269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40121043289) 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, 20060521634 + 20060521635.

It is an arithmetic number, because the mean of its divisors is an integer number (20060521635).

Almost surely, 2^40121043269 is an apocalyptic number.

It is an amenable number.

40121043269 is a deficient number, since it is larger than the sum of its proper divisors (1).

40121043269 is an equidigital number, since it uses as much as digits as its factorization.

40121043269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 40121043269 in words is "forty billion, one hundred twenty-one million, forty-three thousand, two hundred sixty-nine".