5131012121 has 2 divisors, whose sum is σ = 5131012122. Its totient is φ = 5131012120.

The previous prime is 5131012093. The next prime is 5131012141. The reversal of 5131012121 is 1212101315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4119072400 + 1011939721 = 64180^2 + 31811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5131012121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5131012121.

It is not a weakly prime, because it can be changed into another prime (5131012141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2565506060 + 2565506061.

It is an arithmetic number, because the mean of its divisors is an integer number (2565506061).

Almost surely, 2^5131012121 is an apocalyptic number.

It is an amenable number.

5131012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5131012121 is an equidigital number, since it uses as much as digits as its factorization.

5131012121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 5131012121 is about 71631.0834833594. The cubic root of 5131012121 is about 1724.7825388266.

Adding to 5131012121 its reverse (1212101315), we get a palindrome (6343113436).

The spelling of 5131012121 in words is "five billion, one hundred thirty-one million, twelve thousand, one hundred twenty-one".