212122221212 has 24 divisors (see below), whose sum is σ = 408970123632. Its totient is φ = 95464544000.

The previous prime is 212122221193. The next prime is 212122221221.

212122221212 is nontrivially palindromic in base 10.

212122221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23861693 + ... + 23870580.

It is an arithmetic number, because the mean of its divisors is an integer number (17040421818).

Almost surely, 2^212122221212 is an apocalyptic number.

212122221212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212122221212 is a deficient number, since it is larger than the sum of its proper divisors (196847902420).

212122221212 is a wasteful number, since it uses less digits than its factorization.

212122221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47732389 (or 47732387 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

It can be divided in two parts, 212122 and 221212, that added together give a palindrome (433334).

The spelling of 212122221212 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".