11220020197 has 2 divisors, whose sum is σ = 11220020198. Its totient is φ = 11220020196.

The previous prime is 11220020173. The next prime is 11220020219. The reversal of 11220020197 is 79102002211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9064182436 + 2155837761 = 95206^2 + 46431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220020197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220020897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610010098 + 5610010099.

It is an arithmetic number, because the mean of its divisors is an integer number (5610010099).

Almost surely, 2^11220020197 is an apocalyptic number.

It is an amenable number.

11220020197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220020197 is an equidigital number, since it uses as much as digits as its factorization.

11220020197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 11220020197 in words is "eleven billion, two hundred twenty million, twenty thousand, one hundred ninety-seven".