11056305120503 has 4 divisors (see below), whose sum is σ = 11437557021240. Its totient is φ = 10675053219768.

The previous prime is 11056305120491. The next prime is 11056305120517. The reversal of 11056305120503 is 30502150365011.

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

It is a cyclic number.

It is not a de Polignac number, because 11056305120503 - 2⁶ = 11056305120439 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 11056305120503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11056305120593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190625950325 + ... + 190625950382.

It is an arithmetic number, because the mean of its divisors is an integer number (2859389255310).

Almost surely, 2^{11056305120503} is an apocalyptic number.

11056305120503 is a deficient number, since it is larger than the sum of its proper divisors (381251900737).

11056305120503 is an equidigital number, since it uses as much as digits as its factorization.

11056305120503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381251900736.

The product of its (nonzero) digits is 13500, while the sum is 32.

Adding to 11056305120503 its reverse (30502150365011), we get a palindrome (41558455485514).

The spelling of 11056305120503 in words is "eleven trillion, fifty-six billion, three hundred five million, one hundred twenty thousand, five hundred three".