11121221002120 has 16 divisors (see below), whose sum is σ = 25022747254860. Its totient is φ = 4448488400832.

The previous prime is 11121221002063. The next prime is 11121221002127. The reversal of 11121221002120 is 2120012212111.

It can be written as a sum of positive squares in 2 ways, for example, as 11048138367876 + 73082634244 = 3323874^2 + 270338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11121221002094 and 11121221002103.

It is not an unprimeable number, because it can be changed into a prime (11121221002127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139015262487 + ... + 139015262566.

Almost surely, 2^{11121221002120} is an apocalyptic number.

11121221002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121221002120 is an abundant number, since it is smaller than the sum of its proper divisors (13901526252740).

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

11121221002120 is a wasteful number, since it uses less digits than its factorization.

11121221002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278030525064 (or 278030525060 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11121221002120 its reverse (2120012212111), we get a palindrome (13241233214231).

The spelling of 11121221002120 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, two thousand, one hundred twenty".