121000200221 has 2 divisors, whose sum is σ = 121000200222. Its totient is φ = 121000200220.

The previous prime is 121000200203. The next prime is 121000200257. The reversal of 121000200221 is 122002000121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120996144025 + 4056196 = 347845^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000200221 - 2¹⁸ = 120999938077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121000200721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500100110 + 60500100111.

It is an arithmetic number, because the mean of its divisors is an integer number (60500100111).

Almost surely, 2^121000200221 is an apocalyptic number.

It is an amenable number.

121000200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000200221 is an equidigital number, since it uses as much as digits as its factorization.

121000200221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121000200221 its reverse (122002000121), we get a palindrome (243002200342).

The spelling of 121000200221 in words is "one hundred twenty-one billion, two hundred thousand, two hundred twenty-one".