129218108 has 12 divisors (see below), whose sum is σ = 226275000. Its totient is φ = 64568112.

The previous prime is 129218093. The next prime is 129218123. The reversal of 129218108 is 801812921.

It is an interprime number because it is at equal distance from previous prime (129218093) and next prime (129218123).

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2483 + ... + 16266.

It is an arithmetic number, because the mean of its divisors is an integer number (18856250).

Almost surely, 2^129218108 is an apocalyptic number.

It is an amenable number.

129218108 is a deficient number, since it is larger than the sum of its proper divisors (97056892).

129218108 is a wasteful number, since it uses less digits than its factorization.

129218108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20476 (or 20474 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 129218108 is about 11367.4143058129. The cubic root of 129218108 is about 505.5620419532.

The spelling of 129218108 in words is "one hundred twenty-nine million, two hundred eighteen thousand, one hundred eight".