72023032321321 has 2 divisors, whose sum is σ = 72023032321322. Its totient is φ = 72023032321320.

The previous prime is 72023032321291. The next prime is 72023032321363. The reversal of 72023032321321 is 12312323032027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71376543959296 + 646488362025 = 8448464^2 + 804045^2 .

It is an emirp because it is prime and its reverse (12312323032027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72023032321321 - 2¹⁹ = 72023031797033 is a prime.

It is not a weakly prime, because it can be changed into another prime (72029032321321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36011516160660 + 36011516160661.

It is an arithmetic number, because the mean of its divisors is an integer number (36011516160661).

Almost surely, 2^{72023032321321} is an apocalyptic number.

It is an amenable number.

72023032321321 is a deficient number, since it is larger than the sum of its proper divisors (1).

72023032321321 is an equidigital number, since it uses as much as digits as its factorization.

72023032321321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 31.

Adding to 72023032321321 its reverse (12312323032027), we get a palindrome (84335355353348).

The spelling of 72023032321321 in words is "seventy-two trillion, twenty-three billion, thirty-two million, three hundred twenty-one thousand, three hundred twenty-one".