2221212012 has 24 divisors (see below), whose sum is σ = 5199395376. Its totient is φ = 738037248.

The previous prime is 2221212011. The next prime is 2221212013. The reversal of 2221212012 is 2102121222.

It is an interprime number because it is at equal distance from previous prime (2221212011) and next prime (2221212013).

It is a junction number, because it is equal to n+sod(n) for n = 2221211982 and 2221212000.

It is not an unprimeable number, because it can be changed into a prime (2221212011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291933 + ... + 299444.

It is an arithmetic number, because the mean of its divisors is an integer number (216641474).

Almost surely, 2^2221212012 is an apocalyptic number.

It is an amenable number.

2221212012 is an abundant number, since it is smaller than the sum of its proper divisors (2978183364).

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

2221212012 is a wasteful number, since it uses less digits than its factorization.

2221212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591697 (or 591695 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2221212012 is about 47129.7359636143. The cubic root of 2221212012 is about 1304.7581084524.

Adding to 2221212012 its reverse (2102121222), we get a palindrome (4323333234).

The spelling of 2221212012 in words is "two billion, two hundred twenty-one million, two hundred twelve thousand, twelve".