12211830 has 64 divisors (see below), whose sum is σ = 33638400. Its totient is φ = 3149280.

The previous prime is 12211819. The next prime is 12211841. The reversal of 12211830 is 3811221.

It is an interprime number because it is at equal distance from previous prime (12211819) and next prime (12211841).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7641 + ... + 9099.

It is an arithmetic number, because the mean of its divisors is an integer number (525600).

Almost surely, 2^12211830 is an apocalyptic number.

12211830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16819200).

12211830 is an abundant number, since it is smaller than the sum of its proper divisors (21426570).

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

12211830 is a wasteful number, since it uses less digits than its factorization.

12211830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 12211830 is about 3494.5428885621. The cubic root of 12211830 is about 230.2821364390.

It can be divided in two parts, 12211 and 830, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 12211830 in words is "twelve million, two hundred eleven thousand, eight hundred thirty".