1220000209997 has 2 divisors, whose sum is σ = 1220000209998. Its totient is φ = 1220000209996.

The previous prime is 1220000209963. The next prime is 1220000210027. The reversal of 1220000209997 is 7999020000221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994699043716 + 225301166281 = 997346^2 + 474659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220000209997 - 2⁸ = 1220000209741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220000209397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610000104998 + 610000104999.

It is an arithmetic number, because the mean of its divisors is an integer number (610000104999).

Almost surely, 2^{1220000209997} is an apocalyptic number.

It is an amenable number.

1220000209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220000209997 is an equidigital number, since it uses as much as digits as its factorization.

1220000209997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 1220000209997 in words is "one trillion, two hundred twenty billion, two hundred nine thousand, nine hundred ninety-seven".