129825211 has 2 divisors, whose sum is σ = 129825212. Its totient is φ = 129825210.

The previous prime is 129825187. The next prime is 129825239. The reversal of 129825211 is 112528921.

It is a weak prime.

It is an emirp because it is prime and its reverse (112528921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129825211 - 2¹³ = 129817019 is a prime.

It is a super-2 number, since 2×129825211² = 33709170822389042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129825251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64912605 + 64912606.

It is an arithmetic number, because the mean of its divisors is an integer number (64912606).

Almost surely, 2^129825211 is an apocalyptic number.

129825211 is a deficient number, since it is larger than the sum of its proper divisors (1).

129825211 is an equidigital number, since it uses as much as digits as its factorization.

129825211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 31.

The square root of 129825211 is about 11394.0866680924. The cubic root of 129825211 is about 506.3525627490.

The spelling of 129825211 in words is "one hundred twenty-nine million, eight hundred twenty-five thousand, two hundred eleven".