13021011121 has 8 divisors (see below), whose sum is σ = 13149899840. Its totient is φ = 12892625712.

The previous prime is 13021011109. The next prime is 13021011167. The reversal of 13021011121 is 12111012031.

It is a happy number.

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 13021011121 - 2⁹ = 13021010609 is a prime.

It is a super-2 number, since 2×13021011121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13021011191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73725 + ... + 177418.

It is an arithmetic number, because the mean of its divisors is an integer number (1643737480).

Almost surely, 2^13021011121 is an apocalyptic number.

It is an amenable number.

13021011121 is a deficient number, since it is larger than the sum of its proper divisors (128888719).

13021011121 is a wasteful number, since it uses less digits than its factorization.

13021011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251655.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 13021011121 its reverse (12111012031), we get a palindrome (25132023152).

The spelling of 13021011121 in words is "thirteen billion, twenty-one million, eleven thousand, one hundred twenty-one".