109129220 has 24 divisors (see below), whose sum is σ = 230053824. Its totient is φ = 43483616.

The previous prime is 109129213. The next prime is 109129231. The reversal of 109129220 is 22921901.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 109129220.

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, 5114 + ... + 15633.

It is an arithmetic number, because the mean of its divisors is an integer number (9585576).

Almost surely, 2^109129220 is an apocalyptic number.

109129220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109129220 is an abundant number, since it is smaller than the sum of its proper divisors (120924604).

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

109129220 is a wasteful number, since it uses less digits than its factorization.

109129220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21019 (or 21017 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 109129220 is about 10446.4931914973. The cubic root of 109129220 is about 477.8743097220.

The spelling of 109129220 in words is "one hundred nine million, one hundred twenty-nine thousand, two hundred twenty".