13111110223121 has 16 divisors (see below), whose sum is σ = 13244149249344. Its totient is φ = 12978270380544.

The previous prime is 13111110223109. The next prime is 13111110223153. The reversal of 13111110223121 is 12132201111131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13111110223121 is a prime.

It is a super-2 number, since 2×13111110223121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111110223093 and 13111110223102.

It is not an unprimeable number, because it can be changed into a prime (13111110223021) 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, 798135710 + ... + 798152136.

It is an arithmetic number, because the mean of its divisors is an integer number (827759328084).

Almost surely, 2^{13111110223121} is an apocalyptic number.

It is an amenable number.

13111110223121 is a deficient number, since it is larger than the sum of its proper divisors (133039026223).

13111110223121 is a wasteful number, since it uses less digits than its factorization.

13111110223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22000.

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

Adding to 13111110223121 its reverse (12132201111131), we get a palindrome (25243311334252).

The spelling of 13111110223121 in words is "thirteen trillion, one hundred eleven billion, one hundred ten million, two hundred twenty-three thousand, one hundred twenty-one".