11112222120210 has 320 divisors, whose sum is σ = 31005310865760. Its totient is φ = 2853645189120.

The previous prime is 11112222120193. The next prime is 11112222120217. The reversal of 11112222120210 is 1202122221111.

11112222120210 is a `hidden beast` number, since 1 + 1 + 112 + 222 + 120 + 210 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 1181045124081 + 9931176996129 = 1086759^2 + 3151377^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11112222120217) by changing a digit.

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 159 ways as a sum of consecutive naturals, for example, 1278879546 + ... + 1278888234.

Almost surely, 2^{11112222120210} is an apocalyptic number.

11112222120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11112222120210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15502655432880).

11112222120210 is an abundant number, since it is smaller than the sum of its proper divisors (19893088745550).

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

11112222120210 is a wasteful number, since it uses less digits than its factorization.

11112222120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9243 (or 9234 counting only the distinct ones).

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

Adding to 11112222120210 its reverse (1202122221111), we get a palindrome (12314344341321).

The spelling of 11112222120210 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, two hundred ten".