200121011010281 has 2 divisors, whose sum is σ = 200121011010282. Its totient is φ = 200121011010280.

The previous prime is 200121011010229. The next prime is 200121011010329. The reversal of 200121011010281 is 182010110121002.

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., 168492861030400 + 31628149979881 = 12980480^2 + 5623891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121011010281 is a prime.

It is a super-2 number, since 2×200121011010281² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (200121011010881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060505505140 + 100060505505141.

It is an arithmetic number, because the mean of its divisors is an integer number (100060505505141).

Almost surely, 2^{200121011010281} is an apocalyptic number.

It is an amenable number.

200121011010281 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121011010281 is an equidigital number, since it uses as much as digits as its factorization.

200121011010281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 200121011010281 its reverse (182010110121002), we get a palindrome (382131121131283).

The spelling of 200121011010281 in words is "two hundred trillion, one hundred twenty-one billion, eleven million, ten thousand, two hundred eighty-one".