203304242263121 has 2 divisors, whose sum is σ = 203304242263122. Its totient is φ = 203304242263120.

The previous prime is 203304242263081. The next prime is 203304242263127. The reversal of 203304242263121 is 121362242403302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139905463610896 + 63398778652225 = 11828164^2 + 7962335^2 .

It is a cyclic number.

It is not a de Polignac number, because 203304242263121 - 2¹⁴ = 203304242246737 is a prime.

It is a super-2 number, since 2×203304242263121² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203304242263127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101652121131560 + 101652121131561.

It is an arithmetic number, because the mean of its divisors is an integer number (101652121131561).

Almost surely, 2^{203304242263121} is an apocalyptic number.

It is an amenable number.

203304242263121 is a deficient number, since it is larger than the sum of its proper divisors (1).

203304242263121 is an equidigital number, since it uses as much as digits as its factorization.

203304242263121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 203304242263121 its reverse (121362242403302), we get a palindrome (324666484666423).

The spelling of 203304242263121 in words is "two hundred three trillion, three hundred four billion, two hundred forty-two million, two hundred sixty-three thousand, one hundred twenty-one".