11212233911 has 2 divisors, whose sum is σ = 11212233912. Its totient is φ = 11212233910.

The previous prime is 11212233881. The next prime is 11212233919. The reversal of 11212233911 is 11933221211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212233911 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212233919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606116955 + 5606116956.

It is an arithmetic number, because the mean of its divisors is an integer number (5606116956).

Almost surely, 2^11212233911 is an apocalyptic number.

11212233911 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212233911 is an equidigital number, since it uses as much as digits as its factorization.

11212233911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The spelling of 11212233911 in words is "eleven billion, two hundred twelve million, two hundred thirty-three thousand, nine hundred eleven".