2221011220212 has 288 divisors, whose sum is σ = 6203924213760. Its totient is φ = 667025694720.

The previous prime is 2221011220189. The next prime is 2221011220217. The reversal of 2221011220212 is 2120221101222.

It is a happy number.

2221011220212 is a `hidden beast` number, since 2 + 221 + 0 + 11 + 220 + 212 = 666.

2221011220212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (2221011220217) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 991964589 + ... + 991966827.

It is an arithmetic number, because the mean of its divisors is an integer number (21541403520).

Almost surely, 2^{2221011220212} 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 2221011220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3101962106880).

2221011220212 is an abundant number, since it is smaller than the sum of its proper divisors (3982912993548).

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

2221011220212 is a wasteful number, since it uses less digits than its factorization.

2221011220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991 (or 2986 counting only the distinct ones).

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

Adding to 2221011220212 its reverse (2120221101222), we get a palindrome (4341232321434).

The spelling of 2221011220212 in words is "two trillion, two hundred twenty-one billion, eleven million, two hundred twenty thousand, two hundred twelve".