13111231212121 has 8 divisors (see below), whose sum is σ = 14984290445184. Its totient is φ = 11238178529760.

The previous prime is 13111231212119. The next prime is 13111231212139. The reversal of 13111231212121 is 12121213211131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13111231212121 - 2¹ = 13111231212119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111231212092 and 13111231212101.

It is not an unprimeable number, because it can be changed into a prime (13111231212151) 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, 3899301 + ... + 6436381.

It is an arithmetic number, because the mean of its divisors is an integer number (1873036305648).

Almost surely, 2^{13111231212121} is an apocalyptic number.

It is an amenable number.

13111231212121 is a deficient number, since it is larger than the sum of its proper divisors (1873059233063).

13111231212121 is an equidigital number, since it uses as much as digits as its factorization.

13111231212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275351.

The product of its digits is 144, while the sum is 22.

Adding to 13111231212121 its reverse (12121213211131), we get a palindrome (25232444423252).

The spelling of 13111231212121 in words is "thirteen trillion, one hundred eleven billion, two hundred thirty-one million, two hundred twelve thousand, one hundred twenty-one".