11111220019 has 2 divisors, whose sum is σ = 11111220020. Its totient is φ = 11111220018.

The previous prime is 11111220013. The next prime is 11111220037. The reversal of 11111220019 is 91002211111.

11111220019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111220019 - 2¹³ = 11111211827 is a prime.

It is a super-2 number, since 2×11111220019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111219978 and 11111220005.

It is not a weakly prime, because it can be changed into another prime (11111220013) 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, 5555610009 + 5555610010.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610010).

Almost surely, 2^11111220019 is an apocalyptic number.

11111220019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111220019 is an equidigital number, since it uses as much as digits as its factorization.

11111220019 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 19.

It can be divided in two parts, 111112 and 20019, that added together give a palindrome (131131).

The spelling of 11111220019 in words is "eleven billion, one hundred eleven million, two hundred twenty thousand, nineteen".