1210111120120 has 64 divisors (see below), whose sum is σ = 3151103155200. Its totient is φ = 409643395200.

The previous prime is 1210111120021. The next prime is 1210111120157. The reversal of 1210111120120 is 210211110121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210111120120.

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 15 ways as a sum of consecutive naturals, for example, 27331206 + ... + 27375445.

It is an arithmetic number, because the mean of its divisors is an integer number (49235986800).

Almost surely, 2^{1210111120120} is an apocalyptic number.

1210111120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210111120120 is an abundant number, since it is smaller than the sum of its proper divisors (1940992035080).

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

1210111120120 is a wasteful number, since it uses less digits than its factorization.

1210111120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54706748 (or 54706744 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1210111120120 its reverse (210211110121), we get a palindrome (1420322230241).

Subtracting from 1210111120120 its reverse (210211110121), we obtain a palindrome (999900009999).

The spelling of 1210111120120 in words is "one trillion, two hundred ten billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty".