10865769121 has 3 divisors (see below), whose sum is σ = 10865873361. Its totient is φ = 10865664882.

The previous prime is 10865769073. The next prime is 10865769127. The reversal of 10865769121 is 12196756801.

The square root of 10865769121 is 104239.

It is a perfect power (a square), and thus also a powerful number.

10865769121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 10865769121 - 2³¹ = 8718285473 is a prime.

It is a super-2 number, since 2×10865769121² (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 (10865769127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52120 + ... + 156358.

It is an arithmetic number, because the mean of its divisors is an integer number (3621957787).

Almost surely, 2^10865769121 is an apocalyptic number.

10865769121 is the 104239-th square number.

10865769121 is the 52120-th centered octagonal number.

It is an amenable number.

10865769121 is a deficient number, since it is larger than the sum of its proper divisors (104240).

10865769121 is an frugal number, since it uses more digits than its factorization.

10865769121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208478 (or 104239 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 10865769121 in words is "ten billion, eight hundred sixty-five million, seven hundred sixty-nine thousand, one hundred twenty-one".