129722331181 has 2 divisors, whose sum is σ = 129722331182. Its totient is φ = 129722331180.

The previous prime is 129722331169. The next prime is 129722331283. The reversal of 129722331181 is 181133227921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112754924100 + 16967407081 = 335790^2 + 130259^2 .

It is a cyclic number.

It is not a de Polignac number, because 129722331181 - 2¹⁷ = 129722200109 is a prime.

It is a super-2 number, since 2×129722331181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129722331131) 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, 64861165590 + 64861165591.

It is an arithmetic number, because the mean of its divisors is an integer number (64861165591).

Almost surely, 2^129722331181 is an apocalyptic number.

It is an amenable number.

129722331181 is a deficient number, since it is larger than the sum of its proper divisors (1).

129722331181 is an equidigital number, since it uses as much as digits as its factorization.

129722331181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The spelling of 129722331181 in words is "one hundred twenty-nine billion, seven hundred twenty-two million, three hundred thirty-one thousand, one hundred eighty-one".