75222002220221 has 16 divisors (see below), whose sum is σ = 83794551185520. Its totient is φ = 67203650027520.

The previous prime is 75222002220161. The next prime is 75222002220223. The reversal of 75222002220221 is 12202220022257.

It can be written as a sum of positive squares in 8 ways, for example, as 7659997228900 + 67562004991321 = 2767670^2 + 8219611^2 .

It is a cyclic number.

It is not a de Polignac number, because 75222002220221 - 2¹⁰ = 75222002219197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75222002220223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1458386756 + ... + 1458438333.

It is an arithmetic number, because the mean of its divisors is an integer number (5237159449095).

Almost surely, 2^{75222002220221} is an apocalyptic number.

It is an amenable number.

75222002220221 is a deficient number, since it is larger than the sum of its proper divisors (8572548965299).

75222002220221 is a wasteful number, since it uses less digits than its factorization.

75222002220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916825184.

The product of its (nonzero) digits is 8960, while the sum is 29.

Adding to 75222002220221 its reverse (12202220022257), we get a palindrome (87424222242478).

The spelling of 75222002220221 in words is "seventy-five trillion, two hundred twenty-two billion, two million, two hundred twenty thousand, two hundred twenty-one".