11213001 has 12 divisors (see below), whose sum is σ = 16249012. Its totient is φ = 7451136.

The previous prime is 11212997. The next prime is 11213057. The reversal of 11213001 is 10031211.

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 9308601 = 1380^2 + 3051^2 .

It is not a de Polignac number, because 11213001 - 2² = 11212997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1185 + ... + 4881.

Almost surely, 2^11213001 is an apocalyptic number.

It is an amenable number.

11213001 is a deficient number, since it is larger than the sum of its proper divisors (5036011).

11213001 is a wasteful number, since it uses less digits than its factorization.

11213001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040 (or 4037 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 11213001 is about 3348.5819386720. The cubic root of 11213001 is about 223.8243268148.

Adding to 11213001 its reverse (10031211), we get a palindrome (21244212).

The spelling of 11213001 in words is "eleven million, two hundred thirteen thousand, one".