129011228 has 6 divisors (see below), whose sum is σ = 225769656. Its totient is φ = 64505612.

The previous prime is 129011219. The next prime is 129011237. The reversal of 129011228 is 822110921.

It is an interprime number because it is at equal distance from previous prime (129011219) and next prime (129011237).

It is a junction number, because it is equal to n+sod(n) for n = 129011197 and 129011206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16126400 + ... + 16126407.

It is an arithmetic number, because the mean of its divisors is an integer number (37628276).

Almost surely, 2^129011228 is an apocalyptic number.

It is an amenable number.

129011228 is a deficient number, since it is larger than the sum of its proper divisors (96758428).

129011228 is a wasteful number, since it uses less digits than its factorization.

129011228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32252811 (or 32252809 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 129011228 is about 11358.3109659843. The cubic root of 129011228 is about 505.2920938693.

The spelling of 129011228 in words is "one hundred twenty-nine million, eleven thousand, two hundred twenty-eight".