11220110197 has 4 divisors (see below), whose sum is σ = 11295413100. Its totient is φ = 11144807296.

The previous prime is 11220110159. The next prime is 11220110207. The reversal of 11220110197 is 79101102211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79101102211 = 23 ⋅3439178357.

It can be written as a sum of positive squares in 2 ways, for example, as 2316111876 + 8903998321 = 48126^2 + 94361^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220110197 - 2²⁷ = 11085892469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220150197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37651228 + ... + 37651525.

It is an arithmetic number, because the mean of its divisors is an integer number (2823853275).

Almost surely, 2^11220110197 is an apocalyptic number.

It is an amenable number.

11220110197 is a deficient number, since it is larger than the sum of its proper divisors (75302903).

11220110197 is an equidigital number, since it uses as much as digits as its factorization.

11220110197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75302902.

The product of its (nonzero) digits is 252, while the sum is 25.

The spelling of 11220110197 in words is "eleven billion, two hundred twenty million, one hundred ten thousand, one hundred ninety-seven".