11321001 has 12 divisors (see below), whose sum is σ = 16795012. Its totient is φ = 7343136.

The previous prime is 11320973. The next prime is 11321003. The reversal of 11321001 is 10012311.

It can be written as a sum of positive squares in 2 ways, for example, as 8696601 + 2624400 = 2949^2 + 1620^2 .

It is not a de Polignac number, because 11321001 - 2⁷ = 11320873 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 (11321003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16666 + ... + 17331.

Almost surely, 2^11321001 is an apocalyptic number.

It is an amenable number.

11321001 is a deficient number, since it is larger than the sum of its proper divisors (5474011).

11321001 is a wasteful number, since it uses less digits than its factorization.

11321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34040 (or 34037 counting only the distinct ones).

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

The square root of 11321001 is about 3364.6695231479. The cubic root of 11321001 is about 224.5406331513.

Adding to 11321001 its reverse (10012311), we get a palindrome (21333312).

The spelling of 11321001 in words is "eleven million, three hundred twenty-one thousand, one".