7211722501 has 2 divisors, whose sum is σ = 7211722502. Its totient is φ = 7211722500.

The previous prime is 7211722477. The next prime is 7211722513. The reversal of 7211722501 is 1052271127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4726700001 + 2485022500 = 68751^2 + 49850^2 .

It is a cyclic number.

It is not a de Polignac number, because 7211722501 - 2⁷ = 7211722373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7211722501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7211729501) 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, 3605861250 + 3605861251.

It is an arithmetic number, because the mean of its divisors is an integer number (3605861251).

Almost surely, 2^7211722501 is an apocalyptic number.

It is an amenable number.

7211722501 is a deficient number, since it is larger than the sum of its proper divisors (1).

7211722501 is an equidigital number, since it uses as much as digits as its factorization.

7211722501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 7211722501 is about 84921.8611489409. The cubic root of 7211722501 is about 1932.0261593483.

Adding to 7211722501 its reverse (1052271127), we get a palindrome (8263993628).

The spelling of 7211722501 in words is "seven billion, two hundred eleven million, seven hundred twenty-two thousand, five hundred one".