2011220221212 has 576 divisors, whose sum is σ = 6095506120704. Its totient is φ = 554875453440.

The previous prime is 2011220221193. The next prime is 2011220221259. The reversal of 2011220221212 is 2121220221102.

It is a happy number.

2011220221212 is a `hidden beast` number, since 2 + 0 + 11 + 220 + 221 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 694240948 + ... + 694243844.

It is an arithmetic number, because the mean of its divisors is an integer number (10582475904).

Almost surely, 2^{2011220221212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011220221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3047753060352).

2011220221212 is an abundant number, since it is smaller than the sum of its proper divisors (4084285899492).

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

2011220221212 is a wasteful number, since it uses less digits than its factorization.

2011220221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058 (or 3053 counting only the distinct ones).

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

Adding to 2011220221212 its reverse (2121220221102), we get a palindrome (4132440442314).

The spelling of 2011220221212 in words is "two trillion, eleven billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twelve".