12120111121110 has 16 divisors (see below), whose sum is σ = 29088266690736. Its totient is φ = 3232029632288.

The previous prime is 12120111121103. The next prime is 12120111121121. The reversal of 12120111121110 is 1112111102121.

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 12120111121110.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202001851989 + ... + 202001852048.

It is an arithmetic number, because the mean of its divisors is an integer number (1818016668171).

Almost surely, 2^{12120111121110} is an apocalyptic number.

12120111121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12120111121110 is an abundant number, since it is smaller than the sum of its proper divisors (16968155569626).

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

12120111121110 is a wasteful number, since it uses less digits than its factorization.

12120111121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404003704047.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12120111121110 its reverse (1112111102121), we get a palindrome (13232222223231).

The spelling of 12120111121110 in words is "twelve trillion, one hundred twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred ten".