12372021 has 20 divisors (see below), whose sum is σ = 19456800. Its totient is φ = 7812936.

The previous prime is 12372013. The next prime is 12372043. The reversal of 12372021 is 12027321.

12372021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12372021 - 2³ = 12372013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12371985 and 12372003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12372001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2481 + ... + 5558.

It is an arithmetic number, because the mean of its divisors is an integer number (972840).

Almost surely, 2^12372021 is an apocalyptic number.

It is an amenable number.

12372021 is a deficient number, since it is larger than the sum of its proper divisors (7084779).

12372021 is an equidigital number, since it uses as much as digits as its factorization.

12372021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8070 (or 8061 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12372021 is about 3517.3883777598. The cubic root of 12372021 is about 231.2846886361.

Adding to 12372021 its reverse (12027321), we get a palindrome (24399342).

The spelling of 12372021 in words is "twelve million, three hundred seventy-two thousand, twenty-one".