11122121112210 has 48 divisors (see below), whose sum is σ = 28922509774080. Its totient is φ = 2965386667680.

The previous prime is 11122121112187. The next prime is 11122121112251. The reversal of 11122121112210 is 1221112122111.

It is a happy number.

11122121112210 is a `hidden beast` number, since 1 + 11 + 221 + 211 + 1 + 221 + 0 = 666.

It is a super-2 number, since 2×11122121112210² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10148740 + ... + 11191119.

It is an arithmetic number, because the mean of its divisors is an integer number (602552286960).

Almost surely, 2^{11122121112210} is an apocalyptic number.

11122121112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11122121112210 is an abundant number, since it is smaller than the sum of its proper divisors (17800388661870).

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

11122121112210 is a wasteful number, since it uses less digits than its factorization.

11122121112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21345663 (or 21345660 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11122121112210 its reverse (1221112122111), we get a palindrome (12343233234321).

The spelling of 11122121112210 in words is "eleven trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred ten".