12191010 has 32 divisors (see below), whose sum is σ = 31510080. Its totient is φ = 3000768.

The previous prime is 12191009. The next prime is 12191021. The reversal of 12191010 is 1019121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15240 + ... + 16019.

It is an arithmetic number, because the mean of its divisors is an integer number (984690).

Almost surely, 2^12191010 is an apocalyptic number.

12191010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12191010 is an abundant number, since it is smaller than the sum of its proper divisors (19319070).

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

12191010 is a wasteful number, since it uses less digits than its factorization.

12191010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31282.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 12191010 is about 3491.5626873937. The cubic root of 12191010 is about 230.1511923362.

The spelling of 12191010 in words is "twelve million, one hundred ninety-one thousand, ten".