121202210221 has 2 divisors, whose sum is σ = 121202210222. Its totient is φ = 121202210220.

The previous prime is 121202210201. The next prime is 121202210237. The reversal of 121202210221 is 122012202121.

It is a happy number.

It is an a-pointer prime, because the next prime (121202210237) can be obtained adding 121202210221 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104126254596 + 17075955625 = 322686^2 + 130675^2 .

It is an emirp because it is prime and its reverse (122012202121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121202210221 - 2¹¹ = 121202208173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121202210195 and 121202210204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121202210201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601105110 + 60601105111.

It is an arithmetic number, because the mean of its divisors is an integer number (60601105111).

Almost surely, 2^121202210221 is an apocalyptic number.

It is an amenable number.

121202210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202210221 is an equidigital number, since it uses as much as digits as its factorization.

121202210221 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 16.

Adding to 121202210221 its reverse (122012202121), we get a palindrome (243214412342).

The spelling of 121202210221 in words is "one hundred twenty-one billion, two hundred two million, two hundred ten thousand, two hundred twenty-one".