2212121220012 has 192 divisors, whose sum is σ = 6274623398400. Its totient is φ = 668401493760.

The previous prime is 2212121220007. The next prime is 2212121220013. The reversal of 2212121220012 is 2100221212122.

It is a happy number.

2212121220012 is a `hidden beast` number, since 221 + 21 + 212 + 200 + 12 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (2212121220013) 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 63 ways as a sum of consecutive naturals, for example, 1104403003 + ... + 1104405005.

It is an arithmetic number, because the mean of its divisors is an integer number (32680330200).

Almost surely, 2^{2212121220012} is an apocalyptic number.

2212121220012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2212121220012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3137311699200).

2212121220012 is an abundant number, since it is smaller than the sum of its proper divisors (4062502178388).

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

2212121220012 is a wasteful number, since it uses less digits than its factorization.

2212121220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253 (or 4245 counting only the distinct ones).

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

Adding to 2212121220012 its reverse (2100221212122), we get a palindrome (4312342432134).

The spelling of 2212121220012 in words is "two trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, twelve".