129272109872249 has 2 divisors, whose sum is σ = 129272109872250. Its totient is φ = 129272109872248.

The previous prime is 129272109872107. The next prime is 129272109872261. The reversal of 129272109872249 is 942278901272921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69720946908649 + 59551162963600 = 8349907^2 + 7716940^2 .

It is a cyclic number.

It is not a de Polignac number, because 129272109872249 - 2⁴⁴ = 111679923827833 is a prime.

It is a super-2 number, since 2×129272109872249² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129272109872299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64636054936124 + 64636054936125.

It is an arithmetic number, because the mean of its divisors is an integer number (64636054936125).

Almost surely, 2^{129272109872249} is an apocalyptic number.

It is an amenable number.

129272109872249 is a deficient number, since it is larger than the sum of its proper divisors (1).

129272109872249 is an equidigital number, since it uses as much as digits as its factorization.

129272109872249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 129272109872249 in words is "one hundred twenty-nine trillion, two hundred seventy-two billion, one hundred nine million, eight hundred seventy-two thousand, two hundred forty-nine".