40171045121 has 2 divisors, whose sum is σ = 40171045122. Its totient is φ = 40171045120.

The previous prime is 40171045049. The next prime is 40171045157. The reversal of 40171045121 is 12154017104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21855482896 + 18315562225 = 147836^2 + 135335^2 .

It is a cyclic number.

It is not a de Polignac number, because 40171045121 - 2³⁴ = 22991175937 is a prime.

It is a super-2 number, since 2×40171045121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40171045181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20085522560 + 20085522561.

It is an arithmetic number, because the mean of its divisors is an integer number (20085522561).

Almost surely, 2^40171045121 is an apocalyptic number.

It is an amenable number.

40171045121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40171045121 is an equidigital number, since it uses as much as digits as its factorization.

40171045121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The spelling of 40171045121 in words is "forty billion, one hundred seventy-one million, forty-five thousand, one hundred twenty-one".