11221203012120 has 160 divisors (see below), whose sum is σ = 37720359119520. Its totient is φ = 2991951959040.

The previous prime is 11221203012119. The next prime is 11221203012133. The reversal of 11221203012120 is 2121030212211.

11221203012120 is a `hidden beast` number, since 1 + 1 + 221 + 20 + 301 + 2 + 120 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 11221203012093 and 11221203012102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26595205 + ... + 27013835.

It is an arithmetic number, because the mean of its divisors is an integer number (235752244497).

Almost surely, 2^{11221203012120} is an apocalyptic number.

11221203012120 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 11221203012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18860179559760).

11221203012120 is an abundant number, since it is smaller than the sum of its proper divisors (26499156107400).

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

11221203012120 is a wasteful number, since it uses less digits than its factorization.

11221203012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426927 (or 426914 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11221203012120 its reverse (2121030212211), we get a palindrome (13342233224331).

The spelling of 11221203012120 in words is "eleven trillion, two hundred twenty-one billion, two hundred three million, twelve thousand, one hundred twenty".