11123231219 has 2 divisors, whose sum is σ = 11123231220. Its totient is φ = 11123231218.

The previous prime is 11123231209. The next prime is 11123231267. The reversal of 11123231219 is 91213232111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123231219 is a prime.

It is a super-2 number, since 2×11123231219² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11123231209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561615609 + 5561615610.

It is an arithmetic number, because the mean of its divisors is an integer number (5561615610).

Almost surely, 2^11123231219 is an apocalyptic number.

11123231219 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123231219 is an equidigital number, since it uses as much as digits as its factorization.

11123231219 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 11123231219 in words is "eleven billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred nineteen".