10511321243 has 4 divisors (see below), whose sum is σ = 10594087680. Its totient is φ = 10428554808.

The previous prime is 10511321213. The next prime is 10511321257. The reversal of 10511321243 is 34212311501.

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 10511321243 - 2⁸ = 10511320987 is a prime.

It is a super-2 number, since 2×10511321243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10511321213) 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, 41383028 + ... + 41383281.

It is an arithmetic number, because the mean of its divisors is an integer number (2648521920).

Almost surely, 2^10511321243 is an apocalyptic number.

10511321243 is a deficient number, since it is larger than the sum of its proper divisors (82766437).

10511321243 is an equidigital number, since it uses as much as digits as its factorization.

10511321243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82766436.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 10511321243 its reverse (34212311501), we get a palindrome (44723632744).

The spelling of 10511321243 in words is "ten billion, five hundred eleven million, three hundred twenty-one thousand, two hundred forty-three".