7021057129 has 2 divisors, whose sum is σ = 7021057130. Its totient is φ = 7021057128.

The previous prime is 7021057123. The next prime is 7021057207. The reversal of 7021057129 is 9217501207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5598032400 + 1423024729 = 74820^2 + 37723^2 .

It is an emirp because it is prime and its reverse (9217501207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7021057129 - 2⁹ = 7021056617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7021057094 and 7021057103.

It is not a weakly prime, because it can be changed into another prime (7021057123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3510528564 + 3510528565.

It is an arithmetic number, because the mean of its divisors is an integer number (3510528565).

Almost surely, 2^7021057129 is an apocalyptic number.

It is an amenable number.

7021057129 is a deficient number, since it is larger than the sum of its proper divisors (1).

7021057129 is an equidigital number, since it uses as much as digits as its factorization.

7021057129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 7021057129 is about 83791.7485734723. The cubic root of 7021057129 is about 1914.8473978024.

The spelling of 7021057129 in words is "seven billion, twenty-one million, fifty-seven thousand, one hundred twenty-nine".