12111011021213 has 16 divisors (see below), whose sum is σ = 13495642465200. Its totient is φ = 10791282862080.

The previous prime is 12111011021189. The next prime is 12111011021261. The reversal of 12111011021213 is 31212011011121.

It can be written as a sum of positive squares in 8 ways, for example, as 1447213812004 + 10663797209209 = 1203002^2 + 3265547^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111011021213 - 2⁶ = 12111011021149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111011021191 and 12111011021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111016021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2333498 + ... + 5446763.

It is an arithmetic number, because the mean of its divisors is an integer number (843477654075).

Almost surely, 2^{12111011021213} is an apocalyptic number.

12111011021213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12111011021213 is a deficient number, since it is larger than the sum of its proper divisors (1384631443987).

12111011021213 is a wasteful number, since it uses less digits than its factorization.

12111011021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784432.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 12111011021213 its reverse (31212011011121), we get a palindrome (43323022032334).

The spelling of 12111011021213 in words is "twelve trillion, one hundred eleven billion, eleven million, twenty-one thousand, two hundred thirteen".