2111221222110 has 576 divisors, whose sum is σ = 7704523479744. Its totient is φ = 394000588800.

The previous prime is 2111221222091. The next prime is 2111221222193. The reversal of 2111221222110 is 112221221112.

2111221222110 is a `hidden beast` number, since 2 + 111 + 221 + 222 + 110 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 23288070 + ... + 23378550.

It is an arithmetic number, because the mean of its divisors is an integer number (13375908819).

Almost surely, 2^{2111221222110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111221222110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3852261739872).

2111221222110 is an abundant number, since it is smaller than the sum of its proper divisors (5593302257634).

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

2111221222110 is a wasteful number, since it uses less digits than its factorization.

2111221222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90569 (or 90559 counting only the distinct ones).

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

Adding to 2111221222110 its reverse (112221221112), we get a palindrome (2223442443222).

The spelling of 2111221222110 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred ten".