11051230513 has 4 divisors (see below), whose sum is σ = 11216174320. Its totient is φ = 10886286708.

The previous prime is 11051230451. The next prime is 11051230571. The reversal of 11051230513 is 31503215011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31503215011 = 29 ⋅1086317759.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11051230513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11051230573) 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, 82471803 + ... + 82471936.

It is an arithmetic number, because the mean of its divisors is an integer number (2804043580).

Almost surely, 2^11051230513 is an apocalyptic number.

It is an amenable number.

11051230513 is a deficient number, since it is larger than the sum of its proper divisors (164943807).

11051230513 is an equidigital number, since it uses as much as digits as its factorization.

11051230513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164943806.

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 11051230513 its reverse (31503215011), we get a palindrome (42554445524).

The spelling of 11051230513 in words is "eleven billion, fifty-one million, two hundred thirty thousand, five hundred thirteen".