11057121563 has 4 divisors (see below), whose sum is σ = 11057351808. Its totient is φ = 11056891320.

The previous prime is 11057121557. The next prime is 11057121577. The reversal of 11057121563 is 36512175011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36512175011 = 13 ⋅2808628847.

It is a cyclic number.

It is not a de Polignac number, because 11057121563 - 2¹⁰ = 11057120539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11057121503) 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, 12731 + ... + 149252.

It is an arithmetic number, because the mean of its divisors is an integer number (2764337952).

Almost surely, 2^11057121563 is an apocalyptic number.

11057121563 is a deficient number, since it is larger than the sum of its proper divisors (230245).

11057121563 is an equidigital number, since it uses as much as digits as its factorization.

11057121563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230244.

The product of its (nonzero) digits is 6300, while the sum is 32.

Adding to 11057121563 its reverse (36512175011), we get a palindrome (47569296574).

The spelling of 11057121563 in words is "eleven billion, fifty-seven million, one hundred twenty-one thousand, five hundred sixty-three".