12023021 has 2 divisors, whose sum is σ = 12023022. Its totient is φ = 12023020.

The previous prime is 12023003. The next prime is 12023051. The reversal of 12023021 is 12032021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 1590121 = 3230^2 + 1261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12023021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12022993 and 12023011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12023051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011510 + 6011511.

It is an arithmetic number, because the mean of its divisors is an integer number (6011511).

Almost surely, 2^12023021 is an apocalyptic number.

It is an amenable number.

12023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12023021 is an equidigital number, since it uses as much as digits as its factorization.

12023021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12023021 is about 3467.4228181749. The cubic root of 12023021 is about 229.0891575820.

Adding to 12023021 its reverse (12032021), we get a palindrome (24055042).

The spelling of 12023021 in words is "twelve million, twenty-three thousand, twenty-one".