2121101012120 has 64 divisors (see below), whose sum is σ = 4827862686240. Its totient is φ = 838622464000.

The previous prime is 2121101012113. The next prime is 2121101012183. The reversal of 2121101012120 is 212101011212.

It is a junction number, because it is equal to n+sod(n) for n = 2121101012095 and 2121101012104.

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, 1953035 + ... + 2838405.

Almost surely, 2^{2121101012120} is an apocalyptic number.

2121101012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121101012120 is an abundant number, since it is smaller than the sum of its proper divisors (2706761674120).

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

2121101012120 is a wasteful number, since it uses less digits than its factorization.

2121101012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886076 (or 886072 counting only the distinct ones).

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

Adding to 2121101012120 its reverse (212101011212), we get a palindrome (2333202023332).

The spelling of 2121101012120 in words is "two trillion, one hundred twenty-one billion, one hundred one million, twelve thousand, one hundred twenty".