13021001 has 4 divisors (see below), whose sum is σ = 14881152. Its totient is φ = 11160852.

The previous prime is 13020991. The next prime is 13021009. The reversal of 13021001 is 10012031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13021001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13021001.

It is not an unprimeable number, because it can be changed into a prime (13021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930065 + ... + 930078.

It is an arithmetic number, because the mean of its divisors is an integer number (3720288).

Almost surely, 2^13021001 is an apocalyptic number.

It is an amenable number.

13021001 is a deficient number, since it is larger than the sum of its proper divisors (1860151).

13021001 is an equidigital number, since it uses as much as digits as its factorization.

13021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860150.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 13021001 is about 3608.4624149352. The cubic root of 13021001 is about 235.2600170103.

Adding to 13021001 its reverse (10012031), we get a palindrome (23033032).

The spelling of 13021001 in words is "thirteen million, twenty-one thousand, one".