2121110120120 has 32 divisors (see below), whose sum is σ = 4937066661600. Its totient is φ = 819187356288.

The previous prime is 2121110120081. The next prime is 2121110120141. The reversal of 2121110120120 is 210210111212.

It is a junction number, because it is equal to n+sod(n) for n = 2121110120095 and 2121110120104.

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, 914270444 + ... + 914272763.

It is an arithmetic number, because the mean of its divisors is an integer number (154283333175).

Almost surely, 2^{2121110120120} is an apocalyptic number.

2121110120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121110120120 is an abundant number, since it is smaller than the sum of its proper divisors (2815956541480).

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

2121110120120 is a wasteful number, since it uses less digits than its factorization.

2121110120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828543247 (or 1828543243 counting only the distinct ones).

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

Adding to 2121110120120 its reverse (210210111212), we get a palindrome (2331320231332).

The spelling of 2121110120120 in words is "two trillion, one hundred twenty-one billion, one hundred ten million, one hundred twenty thousand, one hundred twenty".