1220211012197 has 2 divisors, whose sum is σ = 1220211012198. Its totient is φ = 1220211012196.

The previous prime is 1220211012191. The next prime is 1220211012217. The reversal of 1220211012197 is 7912101120221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 850390131556 + 369820880641 = 922166^2 + 608129^2 .

It is an emirp because it is prime and its reverse (7912101120221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220211012197 - 2¹⁴ = 1220210995813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220211012191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610105506098 + 610105506099.

It is an arithmetic number, because the mean of its divisors is an integer number (610105506099).

Almost surely, 2^{1220211012197} is an apocalyptic number.

It is an amenable number.

1220211012197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220211012197 is an equidigital number, since it uses as much as digits as its factorization.

1220211012197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 1220211012197 in words is "one trillion, two hundred twenty billion, two hundred eleven million, twelve thousand, one hundred ninety-seven".