12210156 has 96 divisors (see below), whose sum is σ = 37416960. Its totient is φ = 3369600.

The previous prime is 12210137. The next prime is 12210173. The reversal of 12210156 is 65101221.

12210156 is nontrivially palindromic in base 5.

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

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, 23176 + ... + 23696.

It is an arithmetic number, because the mean of its divisors is an integer number (389760).

Almost surely, 2^12210156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12210156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18708480).

12210156 is an abundant number, since it is smaller than the sum of its proper divisors (25206804).

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

12210156 is a wasteful number, since it uses less digits than its factorization.

12210156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12210156 is about 3494.3033640484. The cubic root of 12210156 is about 230.2716135850.

Adding to 12210156 its reverse (65101221), we get a palindrome (77311377).

The spelling of 12210156 in words is "twelve million, two hundred ten thousand, one hundred fifty-six".