11212126111111 has 2 divisors, whose sum is σ = 11212126111112. Its totient is φ = 11212126111110.

The previous prime is 11212126111099. The next prime is 11212126111159. The reversal of 11212126111111 is 11111162121211.

It is a m-pointer prime, because the next prime (11212126111159) can be obtained adding 11212126111111 to its product of digits (48).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11212126111111 - 2¹⁷ = 11212125980039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212126111211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606063055555 + 5606063055556.

It is an arithmetic number, because the mean of its divisors is an integer number (5606063055556).

Almost surely, 2^{11212126111111} is an apocalyptic number.

11212126111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212126111111 is an equidigital number, since it uses as much as digits as its factorization.

11212126111111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 22.

Adding to 11212126111111 its reverse (11111162121211), we get a palindrome (22323288232322).

The spelling of 11212126111111 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-six million, one hundred eleven thousand, one hundred eleven".