5211721129 has 2 divisors, whose sum is σ = 5211721130. Its totient is φ = 5211721128.

The previous prime is 5211721057. The next prime is 5211721139. The reversal of 5211721129 is 9211271125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5177522025 + 34199104 = 71955^2 + 5848^2 .

It is a cyclic number.

It is not a de Polignac number, because 5211721129 - 2¹⁹ = 5211196841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5211721129.

It is not a weakly prime, because it can be changed into another prime (5211721139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605860564 + 2605860565.

It is an arithmetic number, because the mean of its divisors is an integer number (2605860565).

Almost surely, 2^5211721129 is an apocalyptic number.

It is an amenable number.

5211721129 is a deficient number, since it is larger than the sum of its proper divisors (1).

5211721129 is an equidigital number, since it uses as much as digits as its factorization.

5211721129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 31.

The square root of 5211721129 is about 72192.2511700529. The cubic root of 5211721129 is about 1733.7789390293.

The spelling of 5211721129 in words is "five billion, two hundred eleven million, seven hundred twenty-one thousand, one hundred twenty-nine".