6630121 has 2 divisors, whose sum is σ = 6630122. Its totient is φ = 6630120.

The previous prime is 6630103. The next prime is 6630131. The reversal of 6630121 is 1210366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3861225 + 2768896 = 1965^2 + 1664^2 .

It is a cyclic number.

It is not a de Polignac number, because 6630121 - 2⁵ = 6630089 is a prime.

It is not a weakly prime, because it can be changed into another prime (6630101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315060 + 3315061.

It is an arithmetic number, because the mean of its divisors is an integer number (3315061).

Almost surely, 2^6630121 is an apocalyptic number.

It is an amenable number.

6630121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6630121 is an equidigital number, since it uses as much as digits as its factorization.

6630121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 6630121 is about 2574.9021340626. The cubic root of 6630121 is about 187.8626675479.

Adding to 6630121 its reverse (1210366), we get a palindrome (7840487).

The spelling of 6630121 in words is "six million, six hundred thirty thousand, one hundred twenty-one".