72325323121 has 2 divisors, whose sum is σ = 72325323122. Its totient is φ = 72325323120.

The previous prime is 72325323041. The next prime is 72325323127. The reversal of 72325323121 is 12132352327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44548434225 + 27776888896 = 211065^2 + 166664^2 .

It is a cyclic number.

It is not a de Polignac number, because 72325323121 - 2¹⁵ = 72325290353 is a prime.

It is not a weakly prime, because it can be changed into another prime (72325323127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36162661560 + 36162661561.

It is an arithmetic number, because the mean of its divisors is an integer number (36162661561).

Almost surely, 2^72325323121 is an apocalyptic number.

It is an amenable number.

72325323121 is a deficient number, since it is larger than the sum of its proper divisors (1).

72325323121 is an equidigital number, since it uses as much as digits as its factorization.

72325323121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

Adding to 72325323121 its reverse (12132352327), we get a palindrome (84457675448).

The spelling of 72325323121 in words is "seventy-two billion, three hundred twenty-five million, three hundred twenty-three thousand, one hundred twenty-one".