13111220032121 has 16 divisors (see below), whose sum is σ = 13413740870400. Its totient is φ = 12809686819968.

The previous prime is 13111220032109. The next prime is 13111220032129. The reversal of 13111220032121 is 12123002211131.

It is a cyclic number.

It is not a de Polignac number, because 13111220032121 - 2¹⁴ = 13111220015737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111220032093 and 13111220032102.

It is not an unprimeable number, because it can be changed into a prime (13111220032129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230766365 + ... + 230823173.

It is an arithmetic number, because the mean of its divisors is an integer number (838358804400).

Almost surely, 2^{13111220032121} is an apocalyptic number.

It is an amenable number.

13111220032121 is a deficient number, since it is larger than the sum of its proper divisors (302520838279).

13111220032121 is an equidigital number, since it uses as much as digits as its factorization.

13111220032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65408.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 13111220032121 its reverse (12123002211131), we get a palindrome (25234222243252).

The spelling of 13111220032121 in words is "thirteen trillion, one hundred eleven billion, two hundred twenty million, thirty-two thousand, one hundred twenty-one".