12123222011 has 2 divisors, whose sum is σ = 12123222012. Its totient is φ = 12123222010.

The previous prime is 12123221983. The next prime is 12123222017. The reversal of 12123222011 is 11022232121.

It is a strong prime.

It is an emirp because it is prime and its reverse (11022232121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123222011 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12123222017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061611005 + 6061611006.

It is an arithmetic number, because the mean of its divisors is an integer number (6061611006).

Almost surely, 2^12123222011 is an apocalyptic number.

12123222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123222011 is an equidigital number, since it uses as much as digits as its factorization.

12123222011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12123222011 its reverse (11022232121), we get a palindrome (23145454132).

It can be divided in two parts, 1212 and 3222011, that added together give a palindrome (3223223).

The spelling of 12123222011 in words is "twelve billion, one hundred twenty-three million, two hundred twenty-two thousand, eleven".