11111021220120 has 32 divisors (see below), whose sum is σ = 33333063660720. Its totient is φ = 2962938992000.

The previous prime is 11111021220107. The next prime is 11111021220199. The reversal of 11111021220120 is 2102212011111.

It is a happy number.

It is a super-3 number, since 3×11111021220120³ (a number of 40 digits) contains 333 as substring.

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 11111021220120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46295921631 + ... + 46295921870.

Almost surely, 2^{11111021220120} is an apocalyptic number.

11111021220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111021220120 is an abundant number, since it is smaller than the sum of its proper divisors (22222042440600).

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

11111021220120 is a wasteful number, since it uses less digits than its factorization.

11111021220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92591843515 (or 92591843511 counting only the distinct ones).

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

Adding to 11111021220120 its reverse (2102212011111), we get a palindrome (13213233231231).

The spelling of 11111021220120 in words is "eleven trillion, one hundred eleven billion, twenty-one million, two hundred twenty thousand, one hundred twenty".