12141821 has 8 divisors (see below), whose sum is σ = 12359424. Its totient is φ = 11926080.

The previous prime is 12141803. The next prime is 12141827. The reversal of 12141821 is 12814121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12141821 is a prime.

It is a Duffinian number.

12141821 is a modest number, since divided by 1821 gives 1214 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12141793 and 12141802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12141827) 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, 19700 + ... + 20306.

It is an arithmetic number, because the mean of its divisors is an integer number (1544928).

Almost surely, 2^12141821 is an apocalyptic number.

It is an amenable number.

12141821 is a deficient number, since it is larger than the sum of its proper divisors (217603).

12141821 is an equidigital number, since it uses as much as digits as its factorization.

12141821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its digits is 128, while the sum is 20.

The square root of 12141821 is about 3484.5115870090. The cubic root of 12141821 is about 229.8412325842.

Adding to 12141821 its reverse (12814121), we get a palindrome (24955942).

The spelling of 12141821 in words is "twelve million, one hundred forty-one thousand, eight hundred twenty-one".