11112020555 has 4 divisors (see below), whose sum is σ = 13334424672. Its totient is φ = 8889616440.

The previous prime is 11112020497. The next prime is 11112020617. The reversal of 11112020555 is 55502021111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11112020555 - 2¹⁰ = 11112019531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112020555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111202051 + ... + 1111202060.

It is an arithmetic number, because the mean of its divisors is an integer number (3333606168).

Almost surely, 2^11112020555 is an apocalyptic number.

11112020555 is a deficient number, since it is larger than the sum of its proper divisors (2222404117).

11112020555 is an equidigital number, since it uses as much as digits as its factorization.

11112020555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222404116.

The product of its (nonzero) digits is 500, while the sum is 23.

Adding to 11112020555 its reverse (55502021111), we get a palindrome (66614041666).

The spelling of 11112020555 in words is "eleven billion, one hundred twelve million, twenty thousand, five hundred fifty-five".