13111220031121 has 8 divisors (see below), whose sum is σ = 13416313590944. Its totient is φ = 12806134719840.

The previous prime is 13111220031109. The next prime is 13111220031139. The reversal of 13111220031121 is 12113002211131.

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 13111220031121 - 2²⁹ = 13110683160209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111220031101) 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, 1213741 + ... + 5262661.

It is an arithmetic number, because the mean of its divisors is an integer number (1677039198868).

Almost surely, 2^{13111220031121} is an apocalyptic number.

It is an amenable number.

13111220031121 is a deficient number, since it is larger than the sum of its proper divisors (305093559823).

13111220031121 is an equidigital number, since it uses as much as digits as its factorization.

13111220031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124271.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 13111220031121 its reverse (12113002211131), we get a palindrome (25224222242252).

The spelling of 13111220031121 in words is "thirteen trillion, one hundred eleven billion, two hundred twenty million, thirty-one thousand, one hundred twenty-one".