11212011122111 has 2 divisors, whose sum is σ = 11212011122112. Its totient is φ = 11212011122110.

The previous prime is 11212011122107. The next prime is 11212011122113. The reversal of 11212011122111 is 11122111021211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11212011122111 - 2² = 11212011122107 is a prime.

Together with 11212011122113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11212011122111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212011122113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606005561055 + 5606005561056.

It is an arithmetic number, because the mean of its divisors is an integer number (5606005561056).

Almost surely, 2^{11212011122111} is an apocalyptic number.

11212011122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212011122111 is an equidigital number, since it uses as much as digits as its factorization.

11212011122111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11212011122111 its reverse (11122111021211), we get a palindrome (22334122143322).

The spelling of 11212011122111 in words is "eleven trillion, two hundred twelve billion, eleven million, one hundred twenty-two thousand, one hundred eleven".