912111220121 has 2 divisors, whose sum is σ = 912111220122. Its totient is φ = 912111220120.

The previous prime is 912111220099. The next prime is 912111220151. The reversal of 912111220121 is 121022111219.

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., 536754043225 + 375357176896 = 732635^2 + 612664^2 .

It is a cyclic number.

It is not a de Polignac number, because 912111220121 - 2⁶ = 912111220057 is a prime.

It is not a weakly prime, because it can be changed into another prime (912111220151) 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, 456055610060 + 456055610061.

It is an arithmetic number, because the mean of its divisors is an integer number (456055610061).

Almost surely, 2^912111220121 is an apocalyptic number.

It is an amenable number.

912111220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

912111220121 is an equidigital number, since it uses as much as digits as its factorization.

912111220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 912111220121 in words is "nine hundred twelve billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-one".