204524121281 has 2 divisors, whose sum is σ = 204524121282. Its totient is φ = 204524121280.

The previous prime is 204524121257. The next prime is 204524121287. The reversal of 204524121281 is 182121425402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196461697600 + 8062423681 = 443240^2 + 89791^2 .

It is a cyclic number.

It is not a de Polignac number, because 204524121281 - 2³⁴ = 187344252097 is a prime.

It is a super-2 number, since 2×204524121281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204524121287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102262060640 + 102262060641.

It is an arithmetic number, because the mean of its divisors is an integer number (102262060641).

Almost surely, 2^204524121281 is an apocalyptic number.

It is an amenable number.

204524121281 is a deficient number, since it is larger than the sum of its proper divisors (1).

204524121281 is an equidigital number, since it uses as much as digits as its factorization.

204524121281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 32.

Adding to 204524121281 its reverse (182121425402), we get a palindrome (386645546683).

The spelling of 204524121281 in words is "two hundred four billion, five hundred twenty-four million, one hundred twenty-one thousand, two hundred eighty-one".