11001331 has 4 divisors (see below), whose sum is σ = 12001464. Its totient is φ = 10001200.

The previous prime is 11001313. The next prime is 11001371. The reversal of 11001331 is 13310011.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11001331 - 2¹¹ = 10999283 is a prime.

It is a super-2 number, since 2×11001331² = 242058567543122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001301) 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 3 ways as a sum of consecutive naturals, for example, 500050 + ... + 500071.

It is an arithmetic number, because the mean of its divisors is an integer number (3000366).

Almost surely, 2^11001331 is an apocalyptic number.

11001331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11001331 is a deficient number, since it is larger than the sum of its proper divisors (1000133).

11001331 is a wasteful number, since it uses less digits than its factorization.

11001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000132.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 11001331 is about 3316.8254400857. The cubic root of 11001331 is about 222.4069787482.

Adding to 11001331 its reverse (13310011), we get a palindrome (24311342).

It can be divided in two parts, 1100 and 1331, that multiplied together give a square (1464100 = 1210²).

The spelling of 11001331 in words is "eleven million, one thousand, three hundred thirty-one".