12124021 has 16 divisors (see below), whose sum is σ = 15232000. Its totient is φ = 9589104.

The previous prime is 12123977. The next prime is 12124061. The reversal of 12124021 is 12042121.

It is a happy number.

It is not a de Polignac number, because 12124021 - 2¹¹ = 12121973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 12123992 and 12124010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12124061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3100 + ... + 5818.

It is an arithmetic number, because the mean of its divisors is an integer number (952000).

Almost surely, 2^12124021 is an apocalyptic number.

It is an amenable number.

12124021 is a deficient number, since it is larger than the sum of its proper divisors (3107979).

12124021 is an equidigital number, since it uses as much as digits as its factorization.

12124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753 (or 2739 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 12124021 is about 3481.9564902508. The cubic root of 12124021 is about 229.7288613344.

Adding to 12124021 its reverse (12042121), we get a palindrome (24166142).

It can be divided in two parts, 121 and 24021, that added together give a palindrome (24142).

The spelling of 12124021 in words is "twelve million, one hundred twenty-four thousand, twenty-one".