720233043121 has 2 divisors, whose sum is σ = 720233043122. Its totient is φ = 720233043120.

The previous prime is 720233043119. The next prime is 720233043169. The reversal of 720233043121 is 121340332027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637698073600 + 82534969521 = 798560^2 + 287289^2 .

It is an emirp because it is prime and its reverse (121340332027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720233043121 - 2¹ = 720233043119 is a prime.

Together with 720233043119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 720233043121.

It is not a weakly prime, because it can be changed into another prime (720233049121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360116521560 + 360116521561.

It is an arithmetic number, because the mean of its divisors is an integer number (360116521561).

Almost surely, 2^720233043121 is an apocalyptic number.

It is an amenable number.

720233043121 is a deficient number, since it is larger than the sum of its proper divisors (1).

720233043121 is an equidigital number, since it uses as much as digits as its factorization.

720233043121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

Adding to 720233043121 its reverse (121340332027), we get a palindrome (841573375148).

The spelling of 720233043121 in words is "seven hundred twenty billion, two hundred thirty-three million, forty-three thousand, one hundred twenty-one".