13021121121 has 8 divisors (see below), whose sum is σ = 17362215744. Its totient is φ = 8680386960.

The previous prime is 13021121111. The next prime is 13021121149. The reversal of 13021121121 is 12112112031.

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

It is not a de Polignac number, because 13021121121 - 2¹⁴ = 13021104737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13021121121.

It is not an unprimeable number, because it can be changed into a prime (13021121111) 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, 10095 + ... + 161691.

It is an arithmetic number, because the mean of its divisors is an integer number (2170276968).

Almost surely, 2^13021121121 is an apocalyptic number.

It is an amenable number.

13021121121 is a deficient number, since it is larger than the sum of its proper divisors (4341094623).

13021121121 is a wasteful number, since it uses less digits than its factorization.

13021121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180231.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 13021121121 its reverse (12112112031), we get a palindrome (25133233152).

The spelling of 13021121121 in words is "thirteen billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".