40221232171 has 2 divisors, whose sum is σ = 40221232172. Its totient is φ = 40221232170.

The previous prime is 40221232157. The next prime is 40221232187. The reversal of 40221232171 is 17123212204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40221232171 - 2²³ = 40212843563 is a prime.

It is not a weakly prime, because it can be changed into another prime (40221238171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110616085 + 20110616086.

It is an arithmetic number, because the mean of its divisors is an integer number (20110616086).

Almost surely, 2^40221232171 is an apocalyptic number.

40221232171 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221232171 is an equidigital number, since it uses as much as digits as its factorization.

40221232171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 40221232171 its reverse (17123212204), we get a palindrome (57344444375).

The spelling of 40221232171 in words is "forty billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred seventy-one".