11112121019 has 2 divisors, whose sum is σ = 11112121020. Its totient is φ = 11112121018.

The previous prime is 11112121003. The next prime is 11112121021. The reversal of 11112121019 is 91012121111.

11112121019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11112121019 - 2⁴ = 11112121003 is a prime.

It is a super-2 number, since 2×11112121019² (a number of 21 digits) contains 22 as substring.

Together with 11112121021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11112121079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556060509 + 5556060510.

It is an arithmetic number, because the mean of its divisors is an integer number (5556060510).

Almost surely, 2^11112121019 is an apocalyptic number.

11112121019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112121019 is an equidigital number, since it uses as much as digits as its factorization.

11112121019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 11112121019 in words is "eleven billion, one hundred twelve million, one hundred twenty-one thousand, nineteen".