11123121007 has 2 divisors, whose sum is σ = 11123121008. Its totient is φ = 11123121006.

The previous prime is 11123120993. The next prime is 11123121091. The reversal of 11123121007 is 70012132111.

It is a weak prime.

It is an emirp because it is prime and its reverse (70012132111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11123121007 - 2¹⁵ = 11123088239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123128007) 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, 5561560503 + 5561560504.

It is an arithmetic number, because the mean of its divisors is an integer number (5561560504).

Almost surely, 2^11123121007 is an apocalyptic number.

11123121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123121007 is an equidigital number, since it uses as much as digits as its factorization.

11123121007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 11123121007 its reverse (70012132111), we get a palindrome (81135253118).

The spelling of 11123121007 in words is "eleven billion, one hundred twenty-three million, one hundred twenty-one thousand, seven".