13021311121211 has 4 divisors (see below), whose sum is σ = 13025900941152. Its totient is φ = 13016721301272.

The previous prime is 13021311121207. The next prime is 13021311121213. The reversal of 13021311121211 is 11212111312031.

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

It is a cyclic number.

It is not a de Polignac number, because 13021311121211 - 2² = 13021311121207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13021311121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294905715 + ... + 2294911388.

It is an arithmetic number, because the mean of its divisors is an integer number (3256475235288).

Almost surely, 2^{13021311121211} is an apocalyptic number.

13021311121211 is a deficient number, since it is larger than the sum of its proper divisors (4589819941).

13021311121211 is an equidigital number, since it uses as much as digits as its factorization.

13021311121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589819940.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 13021311121211 its reverse (11212111312031), we get a palindrome (24233422433242).

The spelling of 13021311121211 in words is "thirteen trillion, twenty-one billion, three hundred eleven million, one hundred twenty-one thousand, two hundred eleven".