5120131021 has 2 divisors, whose sum is σ = 5120131022. Its totient is φ = 5120131020.

The previous prime is 5120131019. The next prime is 5120131063. The reversal of 5120131021 is 1201310215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5120118025 + 12996 = 71555^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 5120131021 - 2¹ = 5120131019 is a prime.

Together with 5120131019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 5120130986 and 5120131004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5120131421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560065510 + 2560065511.

It is an arithmetic number, because the mean of its divisors is an integer number (2560065511).

Almost surely, 2^5120131021 is an apocalyptic number.

It is an amenable number.

5120131021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5120131021 is an equidigital number, since it uses as much as digits as its factorization.

5120131021 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 16.

The square root of 5120131021 is about 71555.0908112064. The cubic root of 5120131021 is about 1723.5624537849.

Adding to 5120131021 its reverse (1201310215), we get a palindrome (6321441236).

The spelling of 5120131021 in words is "five billion, one hundred twenty million, one hundred thirty-one thousand, twenty-one".