11111133212111 has 2 divisors, whose sum is σ = 11111133212112. Its totient is φ = 11111133212110.

The previous prime is 11111133212107. The next prime is 11111133212147. The reversal of 11111133212111 is 11121233111111.

It is a m-pointer prime, because the next prime (11111133212147) can be obtained adding 11111133212111 to its product of digits (36).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111133212111 - 2² = 11111133212107 is a prime.

It is a super-2 number, since 2×11111133212111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111133212171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555566606055 + 5555566606056.

It is an arithmetic number, because the mean of its divisors is an integer number (5555566606056).

Almost surely, 2^{11111133212111} is an apocalyptic number.

11111133212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111133212111 is an equidigital number, since it uses as much as digits as its factorization.

11111133212111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11111133212111 its reverse (11121233111111), we get a palindrome (22232366323222).

The spelling of 11111133212111 in words is "eleven trillion, one hundred eleven billion, one hundred thirty-three million, two hundred twelve thousand, one hundred eleven".