121202121220321 has 2 divisors, whose sum is σ = 121202121220322. Its totient is φ = 121202121220320.

The previous prime is 121202121220309. The next prime is 121202121220361. The reversal of 121202121220321 is 123022121202121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93075433248721 + 28126687971600 = 9647561^2 + 5303460^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202121220321 - 2²⁵ = 121202087665889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121202121220292 and 121202121220301.

It is not a weakly prime, because it can be changed into another prime (121202121220361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601060610160 + 60601060610161.

It is an arithmetic number, because the mean of its divisors is an integer number (60601060610161).

Almost surely, 2^{121202121220321} is an apocalyptic number.

It is an amenable number.

121202121220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202121220321 is an equidigital number, since it uses as much as digits as its factorization.

121202121220321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 121202121220321 its reverse (123022121202121), we get a palindrome (244224242422442).

The spelling of 121202121220321 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred twenty-one million, two hundred twenty thousand, three hundred twenty-one".