1220221112197 has 2 divisors, whose sum is σ = 1220221112198. Its totient is φ = 1220221112196.

The previous prime is 1220221112183. The next prime is 1220221112203. The reversal of 1220221112197 is 7912111220221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207902110116 + 12319002081 = 1099046^2 + 110991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220221112197 - 2¹⁹ = 1220220587909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220221112597) 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, 610110556098 + 610110556099.

It is an arithmetic number, because the mean of its divisors is an integer number (610110556099).

Almost surely, 2^{1220221112197} is an apocalyptic number.

It is an amenable number.

1220221112197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220221112197 is an equidigital number, since it uses as much as digits as its factorization.

1220221112197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 1220221112197 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twelve thousand, one hundred ninety-seven".