11112211212120 has 192 divisors, whose sum is σ = 37698807032640. Its totient is φ = 2835903052800.

The previous prime is 11112211212031. The next prime is 11112211212161. The reversal of 11112211212120 is 2121211221111.

It is a happy number.

11112211212120 is a `hidden beast` number, since 1 + 111 + 221 + 1 + 212 + 120 = 666.

11112211212120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 11112211212093 and 11112211212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6025596 + ... + 7650635.

It is an arithmetic number, because the mean of its divisors is an integer number (196347953295).

Almost surely, 2^{11112211212120} is an apocalyptic number.

11112211212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112211212120 is an abundant number, since it is smaller than the sum of its proper divisors (26586595820520).

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

11112211212120 is a wasteful number, since it uses less digits than its factorization.

11112211212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13676346 (or 13676339 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11112211212120 its reverse (2121211221111), we get a palindrome (13233422433231).

The spelling of 11112211212120 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty".