121000213361 has 2 divisors, whose sum is σ = 121000213362. Its totient is φ = 121000213360.

The previous prime is 121000213309. The next prime is 121000213363. The reversal of 121000213361 is 163312000121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111262273600 + 9737939761 = 333560^2 + 98681^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000213361 - 2¹⁸ = 120999951217 is a prime.

Together with 121000213363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121000213363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500106680 + 60500106681.

It is an arithmetic number, because the mean of its divisors is an integer number (60500106681).

Almost surely, 2^121000213361 is an apocalyptic number.

It is an amenable number.

121000213361 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000213361 is an equidigital number, since it uses as much as digits as its factorization.

121000213361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121000213361 its reverse (163312000121), we get a palindrome (284312213482).

The spelling of 121000213361 in words is "one hundred twenty-one billion, two hundred thirteen thousand, three hundred sixty-one".