2211221221110 has 192 divisors, whose sum is σ = 6476565288960. Its totient is φ = 518567616000.

The previous prime is 2211221221103. The next prime is 2211221221133. The reversal of 2211221221110 is 111221221122.

2211221221110 is a `hidden beast` number, since 2 + 211 + 221 + 221 + 1 + 10 = 666.

2211221221110 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 an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 92395626 + ... + 92419554.

It is an arithmetic number, because the mean of its divisors is an integer number (33732110880).

Almost surely, 2^{2211221221110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211221221110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3238282644480).

2211221221110 is an abundant number, since it is smaller than the sum of its proper divisors (4265344067850).

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

2211221221110 is a wasteful number, since it uses less digits than its factorization.

2211221221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26995 (or 26992 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2211221221110 its reverse (111221221122), we get a palindrome (2322442442232).

The spelling of 2211221221110 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".