212412212 has 12 divisors (see below), whose sum is σ = 393587460. Its totient is φ = 99958656.

The previous prime is 212412203. The next prime is 212412241. The reversal of 212412212 is 212214212.

It can be written as a sum of positive squares in 2 ways, for example, as 151634596 + 60777616 = 12314^2 + 7796^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561787 + ... + 1561922.

It is an arithmetic number, because the mean of its divisors is an integer number (32798955).

Almost surely, 2^212412212 is an apocalyptic number.

It is an amenable number.

212412212 is a deficient number, since it is larger than the sum of its proper divisors (181175248).

212412212 is a wasteful number, since it uses less digits than its factorization.

212412212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123730 (or 3123728 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 212412212 is about 14574.3683225037. The cubic root of 212412212 is about 596.6594093489.

Adding to 212412212 its reverse (212214212), we get a palindrome (424626424).

The spelling of 212412212 in words is "two hundred twelve million, four hundred twelve thousand, two hundred twelve".