212212122012 has 72 divisors (see below), whose sum is σ = 585607866480. Its totient is φ = 64260894720.

The previous prime is 212212122011. The next prime is 212212122029. The reversal of 212212122012 is 210221212212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212122011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367798 + ... + 748130.

It is an arithmetic number, because the mean of its divisors is an integer number (8133442590).

Almost surely, 2^212212122012 is an apocalyptic number.

212212122012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212212122012 is an abundant number, since it is smaller than the sum of its proper divisors (373395744468).

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

212212122012 is a wasteful number, since it uses less digits than its factorization.

212212122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381763 (or 381758 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212212122012 its reverse (210221212212), we get a palindrome (422433334224).

The spelling of 212212122012 in words is "two hundred twelve billion, two hundred twelve million, one hundred twenty-two thousand, twelve".