11121210012220 has 384 divisors, whose sum is σ = 29777145495552. Its totient is φ = 3388874112000.

The previous prime is 11121210012203. The next prime is 11121210012229. The reversal of 11121210012220 is 2221001212111.

It is a junction number, because it is equal to n+sod(n) for n = 11121210012194 and 11121210012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121210012229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7097133877 + ... + 7097135443.

It is an arithmetic number, because the mean of its divisors is an integer number (77544649728).

Almost surely, 2^{11121210012220} is an apocalyptic number.

11121210012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121210012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14888572747776).

11121210012220 is an abundant number, since it is smaller than the sum of its proper divisors (18655935483332).

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

11121210012220 is a wasteful number, since it uses less digits than its factorization.

11121210012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241 (or 2239 counting only the distinct ones).

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

Adding to 11121210012220 its reverse (2221001212111), we get a palindrome (13342211224331).

The spelling of 11121210012220 in words is "eleven trillion, one hundred twenty-one billion, two hundred ten million, twelve thousand, two hundred twenty".