11121120021210 has 64 divisors (see below), whose sum is σ = 26844909000192. Its totient is φ = 2948542603776.

The previous prime is 11121120021199. The next prime is 11121120021217. The reversal of 11121120021210 is 1212002112111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11121120021210.

It is not an unprimeable number, because it can be changed into a prime (11121120021217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2402302 + ... + 5292758.

It is an arithmetic number, because the mean of its divisors is an integer number (419451703128).

Almost surely, 2^{11121120021210} is an apocalyptic number.

11121120021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11121120021210 is an abundant number, since it is smaller than the sum of its proper divisors (15723788978982).

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

11121120021210 is a wasteful number, since it uses less digits than its factorization.

11121120021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891207.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11121120021210 its reverse (1212002112111), we get a palindrome (12333122133321).

The spelling of 11121120021210 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty million, twenty-one thousand, two hundred ten".