111212120120 has 64 divisors (see below), whose sum is σ = 265813812000. Its totient is φ = 41756871168.

The previous prime is 111212120111. The next prime is 111212120153. The reversal of 111212120120 is 21021212111.

It is a junction number, because it is equal to n+sod(n) for n = 111212120095 and 111212120104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588407 + ... + 754086.

Almost surely, 2^111212120120 is an apocalyptic number.

111212120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212120120 is an abundant number, since it is smaller than the sum of its proper divisors (154601691880).

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

111212120120 is a wasteful number, since it uses less digits than its factorization.

111212120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342632 (or 1342628 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111212120120 its reverse (21021212111), we get a palindrome (132233332231).

The spelling of 111212120120 in words is "one hundred eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty".