3111212213 has 4 divisors (see below), whose sum is σ = 3111748908. Its totient is φ = 3110675520.

The previous prime is 3111212197. The next prime is 3111212227. The reversal of 3111212213 is 3122121113.

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 2440557604 + 670654609 = 49402^2 + 25897^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111212213 - 2⁴ = 3111212197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3111212191 and 3111212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111212263) 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, 259556 + ... + 271277.

It is an arithmetic number, because the mean of its divisors is an integer number (777937227).

Almost surely, 2^3111212213 is an apocalyptic number.

It is an amenable number.

3111212213 is a deficient number, since it is larger than the sum of its proper divisors (536695).

3111212213 is an equidigital number, since it uses as much as digits as its factorization.

3111212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536694.

The product of its digits is 72, while the sum is 17.

The square root of 3111212213 is about 55778.2413939342. The cubic root of 3111212213 is about 1459.8555266124.

Adding to 3111212213 its reverse (3122121113), we get a palindrome (6233333326).

The spelling of 3111212213 in words is "three billion, one hundred eleven million, two hundred twelve thousand, two hundred thirteen".