12211860 has 24 divisors (see below), whose sum is σ = 34193376. Its totient is φ = 3256480.

The previous prime is 12211853. The next prime is 12211867. The reversal of 12211860 is 6811221.

12211860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12211853) and next prime (12211867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101706 + ... + 101825.

It is an arithmetic number, because the mean of its divisors is an integer number (1424724).

Almost surely, 2^12211860 is an apocalyptic number.

12211860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211860 is an abundant number, since it is smaller than the sum of its proper divisors (21981516).

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

12211860 is a wasteful number, since it uses less digits than its factorization.

12211860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203543 (or 203541 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 12211860 is about 3494.5471809664. The cubic root of 12211860 is about 230.2823250119.

It can be divided in two parts, 1221 and 1860, that added together give a triangular number (3081 = T₇₈).

The spelling of 12211860 in words is "twelve million, two hundred eleven thousand, eight hundred sixty".