200129125219921 has 2 divisors, whose sum is σ = 200129125219922. Its totient is φ = 200129125219920.

The previous prime is 200129125219819. The next prime is 200129125219951. The reversal of 200129125219921 is 129912521921002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169798100035600 + 30331025184321 = 13030660^2 + 5507361^2 .

It is a cyclic number.

It is not a de Polignac number, because 200129125219921 - 2¹¹ = 200129125217873 is a prime.

It is a super-2 number, since 2×200129125219921² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (200129125219951) 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, 100064562609960 + 100064562609961.

It is an arithmetic number, because the mean of its divisors is an integer number (100064562609961).

Almost surely, 2^{200129125219921} is an apocalyptic number.

It is an amenable number.

200129125219921 is a deficient number, since it is larger than the sum of its proper divisors (1).

200129125219921 is an equidigital number, since it uses as much as digits as its factorization.

200129125219921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 46.

The spelling of 200129125219921 in words is "two hundred trillion, one hundred twenty-nine billion, one hundred twenty-five million, two hundred nineteen thousand, nine hundred twenty-one".