12211880 has 16 divisors (see below), whose sum is σ = 27476820. Its totient is φ = 4884736.

The previous prime is 12211867. The next prime is 12211907. The reversal of 12211880 is 8811221.

It is a happy number.

12211880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12208036 + 3844 = 3494^2 + 62^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152609 + ... + 152688.

Almost surely, 2^12211880 is an apocalyptic number.

12211880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211880 is an abundant number, since it is smaller than the sum of its proper divisors (15264940).

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

12211880 is a wasteful number, since it uses less digits than its factorization.

12211880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305308 (or 305304 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 12211880 is about 3494.5500425663. The cubic root of 12211880 is about 230.2824507269.

The spelling of 12211880 in words is "twelve million, two hundred eleven thousand, eight hundred eighty".