245252313121 has 2 divisors, whose sum is σ = 245252313122. Its totient is φ = 245252313120.

The previous prime is 245252313113. The next prime is 245252313133. The reversal of 245252313121 is 121313252542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168398612496 + 76853700625 = 410364^2 + 277225^2 .

It is a cyclic number.

It is not a de Polignac number, because 245252313121 - 2³ = 245252313113 is a prime.

It is not a weakly prime, because it can be changed into another prime (245252313821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122626156560 + 122626156561.

It is an arithmetic number, because the mean of its divisors is an integer number (122626156561).

Almost surely, 2^245252313121 is an apocalyptic number.

It is an amenable number.

245252313121 is a deficient number, since it is larger than the sum of its proper divisors (1).

245252313121 is an equidigital number, since it uses as much as digits as its factorization.

245252313121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

Adding to 245252313121 its reverse (121313252542), we get a palindrome (366565565663).

The spelling of 245252313121 in words is "two hundred forty-five billion, two hundred fifty-two million, three hundred thirteen thousand, one hundred twenty-one".