12111121313 has 4 divisors (see below), whose sum is σ = 12111369348. Its totient is φ = 12110873280.

The previous prime is 12111121279. The next prime is 12111121331. The reversal of 12111121313 is 31312111121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31312111121 = 132751 ⋅235871.

It can be written as a sum of positive squares in 2 ways, for example, as 6643554064 + 5467567249 = 81508^2 + 73943^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111121313 - 2¹² = 12111117217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111121291 and 12111121300.

It is not an unprimeable number, because it can be changed into a prime (12111124313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23756 + ... + 157437.

It is an arithmetic number, because the mean of its divisors is an integer number (3027842337).

Almost surely, 2^12111121313 is an apocalyptic number.

It is an amenable number.

12111121313 is a deficient number, since it is larger than the sum of its proper divisors (248035).

12111121313 is an equidigital number, since it uses as much as digits as its factorization.

12111121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248034.

The product of its digits is 36, while the sum is 17.

Adding to 12111121313 its reverse (31312111121), we get a palindrome (43423232434).

The spelling of 12111121313 in words is "twelve billion, one hundred eleven million, one hundred twenty-one thousand, three hundred thirteen".