2213131212 has 36 divisors (see below), whose sum is σ = 5596685640. Its totient is φ = 737396352.

The previous prime is 2213131211. The next prime is 2213131237. The reversal of 2213131212 is 2121313122.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2213131211) 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 11 ways as a sum of consecutive naturals, for example, 82143 + ... + 105705.

It is an arithmetic number, because the mean of its divisors is an integer number (155463490).

Almost surely, 2^2213131212 is an apocalyptic number.

It is an amenable number.

2213131212 is an abundant number, since it is smaller than the sum of its proper divisors (3383554428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2213131212 is a wasteful number, since it uses less digits than its factorization.

2213131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26182 (or 26177 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2213131212 is about 47043.9285349342. The cubic root of 2213131212 is about 1303.1739431474.

Adding to 2213131212 its reverse (2121313122), we get a palindrome (4334444334).

The spelling of 2213131212 in words is "two billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred twelve".