12011121113 has 4 divisors (see below), whose sum is σ = 12146077620. Its totient is φ = 11876164608.

The previous prime is 12011121103. The next prime is 12011121169. The reversal of 12011121113 is 31112111021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31112111021 = 1511 ⋅20590411.

It can be written as a sum of positive squares in 2 ways, for example, as 8113865929 + 3897255184 = 90077^2 + 62428^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011121113 - 2⁴ = 12011121097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011121103) 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, 67478120 + ... + 67478297.

It is an arithmetic number, because the mean of its divisors is an integer number (3036519405).

Almost surely, 2^12011121113 is an apocalyptic number.

It is an amenable number.

12011121113 is a deficient number, since it is larger than the sum of its proper divisors (134956507).

12011121113 is an equidigital number, since it uses as much as digits as its factorization.

12011121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134956506.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12011121113 its reverse (31112111021), we get a palindrome (43123232134).

The spelling of 12011121113 in words is "twelve billion, eleven million, one hundred twenty-one thousand, one hundred thirteen".