245022121 has 2 divisors, whose sum is σ = 245022122. Its totient is φ = 245022120.

The previous prime is 245022079. The next prime is 245022163. The reversal of 245022121 is 121220542.

It is a balanced prime because it is at equal distance from previous prime (245022079) and next prime (245022163).

It can be written as a sum of positive squares in only one way, i.e., 205520896 + 39501225 = 14336^2 + 6285^2 .

It is a cyclic number.

It is not a de Polignac number, because 245022121 - 2⁷ = 245021993 is a prime.

It is not a weakly prime, because it can be changed into another prime (245022721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122511060 + 122511061.

It is an arithmetic number, because the mean of its divisors is an integer number (122511061).

Almost surely, 2^245022121 is an apocalyptic number.

It is an amenable number.

245022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

245022121 is an equidigital number, since it uses as much as digits as its factorization.

245022121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 245022121 is about 15653.1824559736. The cubic root of 245022121 is about 625.7513064200.

Adding to 245022121 its reverse (121220542), we get a palindrome (366242663).

The spelling of 245022121 in words is "two hundred forty-five million, twenty-two thousand, one hundred twenty-one".