129211044 has 24 divisors (see below), whose sum is σ = 308505120. Its totient is φ = 42068544.

The previous prime is 129211021. The next prime is 129211051. The reversal of 129211044 is 440112921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124689 + ... + 125720.

It is an arithmetic number, because the mean of its divisors is an integer number (12854380).

Almost surely, 2^129211044 is an apocalyptic number.

It is an amenable number.

129211044 is an abundant number, since it is smaller than the sum of its proper divisors (179294076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129211044 is a wasteful number, since it uses less digits than its factorization.

129211044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250459 (or 250457 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 129211044 is about 11367.1035888655. The cubic root of 129211044 is about 505.5528292213.

Adding to 129211044 its reverse (440112921), we get a palindrome (569323965).

The spelling of 129211044 in words is "one hundred twenty-nine million, two hundred eleven thousand, forty-four".