6551240214121 has 2 divisors, whose sum is σ = 6551240214122. Its totient is φ = 6551240214120.

The previous prime is 6551240214083. The next prime is 6551240214143. The reversal of 6551240214121 is 1214120421556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6493705475625 + 57534738496 = 2548275^2 + 239864^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551240214121 - 2⁷ = 6551240213993 is a prime.

It is not a weakly prime, because it can be changed into another prime (6551240314121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275620107060 + 3275620107061.

It is an arithmetic number, because the mean of its divisors is an integer number (3275620107061).

Almost surely, 2^{6551240214121} is an apocalyptic number.

It is an amenable number.

6551240214121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551240214121 is an equidigital number, since it uses as much as digits as its factorization.

6551240214121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 34.

Adding to 6551240214121 its reverse (1214120421556), we get a palindrome (7765360635677).

The spelling of 6551240214121 in words is "six trillion, five hundred fifty-one billion, two hundred forty million, two hundred fourteen thousand, one hundred twenty-one".