212111321113 has 4 divisors (see below), whose sum is σ = 212640277428. Its totient is φ = 211582364800.

The previous prime is 212111321099. The next prime is 212111321159. The reversal of 212111321113 is 311123111212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 201562387849 + 10548933264 = 448957^2 + 102708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212111321113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212111321183) 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 3 ways as a sum of consecutive naturals, for example, 264477556 + ... + 264478357.

It is an arithmetic number, because the mean of its divisors is an integer number (53160069357).

Almost surely, 2^212111321113 is an apocalyptic number.

It is an amenable number.

212111321113 is a deficient number, since it is larger than the sum of its proper divisors (528956315).

212111321113 is an equidigital number, since it uses as much as digits as its factorization.

212111321113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528956314.

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

Adding to 212111321113 its reverse (311123111212), we get a palindrome (523234432325).

The spelling of 212111321113 in words is "two hundred twelve billion, one hundred eleven million, three hundred twenty-one thousand, one hundred thirteen".