11111200120 has 16 divisors (see below), whose sum is σ = 25000200360. Its totient is φ = 4444480032.

The previous prime is 11111200117. The next prime is 11111200147. The reversal of 11111200120 is 2100211111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11111200097 and 11111200106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138889962 + ... + 138890041.

Almost surely, 2^11111200120 is an apocalyptic number.

11111200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111200120 is an abundant number, since it is smaller than the sum of its proper divisors (13889000240).

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

11111200120 is a wasteful number, since it uses less digits than its factorization.

11111200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277780014 (or 277780010 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11111200120 its reverse (2100211111), we get a palindrome (13211411231).

The spelling of 11111200120 in words is "eleven billion, one hundred eleven million, two hundred thousand, one hundred twenty".