12211770 has 16 divisors (see below), whose sum is σ = 29308320. Its totient is φ = 3256464.

The previous prime is 12211757. The next prime is 12211789. The reversal of 12211770 is 7711221.

It is a happy 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 in 7 ways as a sum of consecutive naturals, for example, 203500 + ... + 203559.

It is an arithmetic number, because the mean of its divisors is an integer number (1831770).

Almost surely, 2^12211770 is an apocalyptic number.

12211770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211770 is an abundant number, since it is smaller than the sum of its proper divisors (17096550).

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

12211770 is a wasteful number, since it uses less digits than its factorization.

12211770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407069.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 12211770 is about 3494.5343037378. The cubic root of 12211770 is about 230.2817592924.

Adding to 12211770 its reverse (7711221), we get a palindrome (19922991).

The spelling of 12211770 in words is "twelve million, two hundred eleven thousand, seven hundred seventy".