13011123121 has 8 divisors (see below), whose sum is σ = 13073685984. Its totient is φ = 12948606720.

The previous prime is 13011123071. The next prime is 13011123143. The reversal of 13011123121 is 12132111031.

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 13011123121 - 2¹³ = 13011114929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13011123095 and 13011123104.

It is not an unprimeable number, because it can be changed into a prime (13011129121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635281 + ... + 655441.

It is an arithmetic number, because the mean of its divisors is an integer number (1634210748).

Almost surely, 2^13011123121 is an apocalyptic number.

It is an amenable number.

13011123121 is a deficient number, since it is larger than the sum of its proper divisors (62562863).

13011123121 is a wasteful number, since it uses less digits than its factorization.

13011123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23231.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 13011123121 its reverse (12132111031), we get a palindrome (25143234152).

The spelling of 13011123121 in words is "thirteen billion, eleven million, one hundred twenty-three thousand, one hundred twenty-one".