11121021210 has 128 divisors (see below), whose sum is σ = 29928890880. Its totient is φ = 2625831936.

The previous prime is 11121021199. The next prime is 11121021227. The reversal of 11121021210 is 1212012111.

11121021210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11121021210² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1772539 + ... + 1778801.

It is an arithmetic number, because the mean of its divisors is an integer number (233819460).

Almost surely, 2^11121021210 is an apocalyptic number.

11121021210 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 11121021210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14964445440).

11121021210 is an abundant number, since it is smaller than the sum of its proper divisors (18807869670).

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

11121021210 is a wasteful number, since it uses less digits than its factorization.

11121021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11121021210 its reverse (1212012111), we get a palindrome (12333033321).

Subtracting from 11121021210 its reverse (1212012111), we obtain a palindrome (9909009099).

The spelling of 11121021210 in words is "eleven billion, one hundred twenty-one million, twenty-one thousand, two hundred ten".