4320523121 has 2 divisors, whose sum is σ = 4320523122. Its totient is φ = 4320523120.

The previous prime is 4320523111. The next prime is 4320523127. The reversal of 4320523121 is 1213250234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4298244721 + 22278400 = 65561^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 4320523121 - 2¹⁸ = 4320260977 is a prime.

It is not a weakly prime, because it can be changed into another prime (4320523127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2160261560 + 2160261561.

It is an arithmetic number, because the mean of its divisors is an integer number (2160261561).

Almost surely, 2^4320523121 is an apocalyptic number.

It is an amenable number.

4320523121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4320523121 is an equidigital number, since it uses as much as digits as its factorization.

4320523121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 4320523121 is about 65730.6862964324. The cubic root of 4320523121 is about 1628.7163066026.

Adding to 4320523121 its reverse (1213250234), we get a palindrome (5533773355).

The spelling of 4320523121 in words is "four billion, three hundred twenty million, five hundred twenty-three thousand, one hundred twenty-one".