11121000197 has 2 divisors, whose sum is σ = 11121000198. Its totient is φ = 11121000196.

The previous prime is 11121000193. The next prime is 11121000223. The reversal of 11121000197 is 79100012111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11009465476 + 111534721 = 104926^2 + 10561^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121000197 - 2² = 11121000193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121000193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560500098 + 5560500099.

It is an arithmetic number, because the mean of its divisors is an integer number (5560500099).

Almost surely, 2^11121000197 is an apocalyptic number.

It is an amenable number.

11121000197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121000197 is an equidigital number, since it uses as much as digits as its factorization.

11121000197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 23.

The spelling of 11121000197 in words is "eleven billion, one hundred twenty-one million, one hundred ninety-seven", and thus it is an aban number.