121112020222261 has 2 divisors, whose sum is σ = 121112020222262. Its totient is φ = 121112020222260.

The previous prime is 121112020222229. The next prime is 121112020222289. The reversal of 121112020222261 is 162222020211121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88884940150161 + 32227080072100 = 9427881^2 + 5676890^2 .

It is a cyclic number.

It is not a de Polignac number, because 121112020222261 - 2⁵ = 121112020222229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121112020622261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556010111130 + 60556010111131.

It is an arithmetic number, because the mean of its divisors is an integer number (60556010111131).

Almost surely, 2^{121112020222261} is an apocalyptic number.

It is an amenable number.

121112020222261 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112020222261 is an equidigital number, since it uses as much as digits as its factorization.

121112020222261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 121112020222261 its reverse (162222020211121), we get a palindrome (283334040433382).

The spelling of 121112020222261 in words is "one hundred twenty-one trillion, one hundred twelve billion, twenty million, two hundred twenty-two thousand, two hundred sixty-one".