11199777241 has 3 divisors (see below), whose sum is σ = 11199883071. Its totient is φ = 11199671412.

The previous prime is 11199777229. The next prime is 11199777301. The reversal of 11199777241 is 14277799111.

The square root of 11199777241 is 105829.

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

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, and also an emirpimes, since its reverse is a distinct semiprime: 14277799111 = 151 ⋅94554961.

It can be written as a sum of positive squares in only one way, i.e., 586656841 + 10613120400 = 24221^2 + 103020^2 .

It is not a de Polignac number, because 11199777241 - 2¹⁵ = 11199744473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11199774241) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 52915 + ... + 158743.

It is an arithmetic number, because the mean of its divisors is an integer number (3733294357).

Almost surely, 2^11199777241 is an apocalyptic number.

11199777241 is the 105829-th square number.

11199777241 is the 52915-th centered octagonal number.

It is an amenable number.

11199777241 is a deficient number, since it is larger than the sum of its proper divisors (105830).

11199777241 is an frugal number, since it uses more digits than its factorization.

11199777241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211658 (or 105829 counting only the distinct ones).

The product of its digits is 222264, while the sum is 49.

Multiplying 11199777241 by its sum of digits (49), we get a square (548789084809 = 740803²).

The spelling of 11199777241 in words is "eleven billion, one hundred ninety-nine million, seven hundred seventy-seven thousand, two hundred forty-one".