320144125121 has 2 divisors, whose sum is σ = 320144125122. Its totient is φ = 320144125120.

The previous prime is 320144125111. The next prime is 320144125127. The reversal of 320144125121 is 121521441023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308953658896 + 11190466225 = 555836^2 + 105785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320144125121 is a prime.

It is not a weakly prime, because it can be changed into another prime (320144125127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160072062560 + 160072062561.

It is an arithmetic number, because the mean of its divisors is an integer number (160072062561).

Almost surely, 2^320144125121 is an apocalyptic number.

It is an amenable number.

320144125121 is a deficient number, since it is larger than the sum of its proper divisors (1).

320144125121 is an equidigital number, since it uses as much as digits as its factorization.

320144125121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 320144125121 its reverse (121521441023), we get a palindrome (441665566144).

The spelling of 320144125121 in words is "three hundred twenty billion, one hundred forty-four million, one hundred twenty-five thousand, one hundred twenty-one".