11212101100091 has 2 divisors, whose sum is σ = 11212101100092. Its totient is φ = 11212101100090.

The previous prime is 11212101100051. The next prime is 11212101100097. The reversal of 11212101100091 is 19000110121211.

It is a strong prime.

It is an emirp because it is prime and its reverse (19000110121211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212101100091 is a prime.

It is a super-2 number, since 2×11212101100091² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212101100097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606050550045 + 5606050550046.

It is an arithmetic number, because the mean of its divisors is an integer number (5606050550046).

Almost surely, 2^{11212101100091} is an apocalyptic number.

11212101100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212101100091 is an equidigital number, since it uses as much as digits as its factorization.

11212101100091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 11212101100091 in words is "eleven trillion, two hundred twelve billion, one hundred one million, one hundred thousand, ninety-one".