5663215121 has 2 divisors, whose sum is σ = 5663215122. Its totient is φ = 5663215120.

The previous prime is 5663215087. The next prime is 5663215157. The reversal of 5663215121 is 1215123665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4961230096 + 701985025 = 70436^2 + 26495^2 .

It is a cyclic number.

It is not a de Polignac number, because 5663215121 - 2⁶ = 5663215057 is a prime.

It is not a weakly prime, because it can be changed into another prime (5663215421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2831607560 + 2831607561.

It is an arithmetic number, because the mean of its divisors is an integer number (2831607561).

Almost surely, 2^5663215121 is an apocalyptic number.

It is an amenable number.

5663215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5663215121 is an equidigital number, since it uses as much as digits as its factorization.

5663215121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 5663215121 is about 75254.3362272235. The cubic root of 5663215121 is about 1782.4650357739.

Adding to 5663215121 its reverse (1215123665), we get a palindrome (6878338786).

The spelling of 5663215121 in words is "five billion, six hundred sixty-three million, two hundred fifteen thousand, one hundred twenty-one".