12070021 has 2 divisors, whose sum is σ = 12070022. Its totient is φ = 12070020.

The previous prime is 12069989. The next prime is 12070049. The reversal of 12070021 is 12007021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9541921 + 2528100 = 3089^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 12070021 - 2⁵ = 12069989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12069983 and 12070010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12070081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6035010 + 6035011.

It is an arithmetic number, because the mean of its divisors is an integer number (6035011).

Almost surely, 2^12070021 is an apocalyptic number.

It is an amenable number.

12070021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12070021 is an equidigital number, since it uses as much as digits as its factorization.

12070021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 12070021 is about 3474.1935754935. The cubic root of 12070021 is about 229.3872853861.

Adding to 12070021 its reverse (12007021), we get a palindrome (24077042).

The spelling of 12070021 in words is "twelve million, seventy thousand, twenty-one".