11121121019 has 2 divisors, whose sum is σ = 11121121020. Its totient is φ = 11121121018.

The previous prime is 11121121007. The next prime is 11121121061. The reversal of 11121121019 is 91012112111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11121121019 - 2²⁰ = 11120072443 is a prime.

It is a super-2 number, since 2×11121121019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11121121919) 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, 5560560509 + 5560560510.

It is an arithmetic number, because the mean of its divisors is an integer number (5560560510).

Almost surely, 2^11121121019 is an apocalyptic number.

11121121019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121121019 is an equidigital number, since it uses as much as digits as its factorization.

11121121019 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 11121121019 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, nineteen".