13121211 has 8 divisors (see below), whose sum is σ = 17527104. Its totient is φ = 8731400.

The previous prime is 13121209. The next prime is 13121219. The reversal of 13121211 is 11212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13121211 - 2¹ = 13121209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13121219) 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 7 ways as a sum of consecutive naturals, for example, 1965 + ... + 5486.

It is an arithmetic number, because the mean of its divisors is an integer number (2190888).

Almost surely, 2^13121211 is an apocalyptic number.

13121211 is a deficient number, since it is larger than the sum of its proper divisors (4405893).

13121211 is an equidigital number, since it uses as much as digits as its factorization.

13121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8041.

The product of its digits is 12, while the sum is 12.

The square root of 13121211 is about 3622.3212171203. The cubic root of 13121211 is about 235.8619979836.

Adding to 13121211 its reverse (11212131), we get a palindrome (24333342).

The spelling of 13121211 in words is "thirteen million, one hundred twenty-one thousand, two hundred eleven".