129020212 has 6 divisors (see below), whose sum is σ = 225785378. Its totient is φ = 64510104.

The previous prime is 129020207. The next prime is 129020261. The reversal of 129020212 is 212020921.

It can be written as a sum of positive squares in only one way, i.e., 74200996 + 54819216 = 8614^2 + 7404^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129020212.

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, 16127523 + ... + 16127530.

Almost surely, 2^129020212 is an apocalyptic number.

It is an amenable number.

129020212 is a deficient number, since it is larger than the sum of its proper divisors (96765166).

129020212 is a wasteful number, since it uses less digits than its factorization.

129020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32255057 (or 32255055 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 129020212 is about 11358.7064404359. The cubic root of 129020212 is about 505.3038226645.

The spelling of 129020212 in words is "one hundred twenty-nine million, twenty thousand, two hundred twelve".