11212100197 has 2 divisors, whose sum is σ = 11212100198. Its totient is φ = 11212100196.

The previous prime is 11212100189. The next prime is 11212100239. The reversal of 11212100197 is 79100121211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6935724961 + 4276375236 = 83281^2 + 65394^2 .

It is an emirp because it is prime and its reverse (79100121211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11212100197 - 2³ = 11212100189 is a prime.

It is a super-2 number, since 2×11212100197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212100297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606050098 + 5606050099.

It is an arithmetic number, because the mean of its divisors is an integer number (5606050099).

Almost surely, 2^11212100197 is an apocalyptic number.

It is an amenable number.

11212100197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212100197 is an equidigital number, since it uses as much as digits as its factorization.

11212100197 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 11212100197 in words is "eleven billion, two hundred twelve million, one hundred thousand, one hundred ninety-seven".