1221200112163 has 2 divisors, whose sum is σ = 1221200112164. Its totient is φ = 1221200112162.

The previous prime is 1221200112137. The next prime is 1221200112277. The reversal of 1221200112163 is 3612110021221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221200112163 - 2¹⁷ = 1221199981091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221200112103) 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, 610600056081 + 610600056082.

It is an arithmetic number, because the mean of its divisors is an integer number (610600056082).

Almost surely, 2^{1221200112163} is an apocalyptic number.

1221200112163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221200112163 is an equidigital number, since it uses as much as digits as its factorization.

1221200112163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 1221200112163 its reverse (3612110021221), we get a palindrome (4833310133384).

The spelling of 1221200112163 in words is "one trillion, two hundred twenty-one billion, two hundred million, one hundred twelve thousand, one hundred sixty-three".