129220930 has 32 divisors (see below), whose sum is σ = 239355648. Its totient is φ = 50198400.

The previous prime is 129220921. The next prime is 129220937. The reversal of 129220930 is 39022921.

It is not an unprimeable number, because it can be changed into a prime (129220937) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 110529 + ... + 111691.

It is an arithmetic number, because the mean of its divisors is an integer number (7479864).

Almost surely, 2^129220930 is an apocalyptic number.

129220930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129220930 is a deficient number, since it is larger than the sum of its proper divisors (110134718).

129220930 is a wasteful number, since it uses less digits than its factorization.

129220930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 129220930 is about 11367.5384318682. The cubic root of 129220930 is about 505.5657222570.

It can be divided in two parts, 1292 and 20930, that added together give a palindrome (22222).

The spelling of 129220930 in words is "one hundred twenty-nine million, two hundred twenty thousand, nine hundred thirty".