2211022221012 has 144 divisors (see below), whose sum is σ = 6326357506560. Its totient is φ = 645033369600.

The previous prime is 2211022220977. The next prime is 2211022221119. The reversal of 2211022221012 is 2101222201122.

It is a happy number.

2211022221012 is a `hidden beast` number, since 221 + 1 + 0 + 222 + 210 + 12 = 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 (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1902664 + ... + 2835872.

It is an arithmetic number, because the mean of its divisors is an integer number (43933038240).

Almost surely, 2^{2211022221012} is an apocalyptic number.

2211022221012 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 2211022221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3163178753280).

2211022221012 is an abundant number, since it is smaller than the sum of its proper divisors (4115335285548).

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

2211022221012 is a wasteful number, since it uses less digits than its factorization.

2211022221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933454 (or 933449 counting only the distinct ones).

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

Adding to 2211022221012 its reverse (2101222201122), we get a palindrome (4312244422134).

The spelling of 2211022221012 in words is "two trillion, two hundred eleven billion, twenty-two million, two hundred twenty-one thousand, twelve".