121000200257 has 2 divisors, whose sum is σ = 121000200258. Its totient is φ = 121000200256.

The previous prime is 121000200221. The next prime is 121000200287. The reversal of 121000200257 is 752002000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118908418561 + 2091781696 = 344831^2 + 45736^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000200257 - 2¹⁶ = 121000134721 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000200287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500100128 + 60500100129.

It is an arithmetic number, because the mean of its divisors is an integer number (60500100129).

Almost surely, 2^121000200257 is an apocalyptic number.

It is an amenable number.

121000200257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000200257 is an equidigital number, since it uses as much as digits as its factorization.

121000200257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

Adding to 121000200257 its reverse (752002000121), we get a palindrome (873002200378).

The spelling of 121000200257 in words is "one hundred twenty-one billion, two hundred thousand, two hundred fifty-seven".