6722025221 has 2 divisors, whose sum is σ = 6722025222. Its totient is φ = 6722025220.

The previous prime is 6722025161. The next prime is 6722025223. The reversal of 6722025221 is 1225202276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4931550625 + 1790474596 = 70225^2 + 42314^2 .

It is a cyclic number.

It is not a de Polignac number, because 6722025221 - 2¹⁴ = 6722008837 is a prime.

It is a Sophie Germain prime.

Together with 6722025223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6722025223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361012610 + 3361012611.

It is an arithmetic number, because the mean of its divisors is an integer number (3361012611).

Almost surely, 2^6722025221 is an apocalyptic number.

It is an amenable number.

6722025221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6722025221 is an equidigital number, since it uses as much as digits as its factorization.

6722025221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 6722025221 is about 81987.9577803960. The cubic root of 6722025221 is about 1887.2671439773.

Adding to 6722025221 its reverse (1225202276), we get a palindrome (7947227497).

The spelling of 6722025221 in words is "six billion, seven hundred twenty-two million, twenty-five thousand, two hundred twenty-one".