2121112100120 has 32 divisors (see below), whose sum is σ = 5139617782320. Its totient is φ = 783179852160.

The previous prime is 2121112100111. The next prime is 2121112100167. The reversal of 2121112100120 is 210012111212.

It is a junction number, because it is equal to n+sod(n) for n = 2121112100095 and 2121112100104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039530346 + ... + 2039531385.

Almost surely, 2^{2121112100120} is an apocalyptic number.

2121112100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121112100120 is an abundant number, since it is smaller than the sum of its proper divisors (3018505682200).

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

2121112100120 is a wasteful number, since it uses less digits than its factorization.

2121112100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079061755 (or 4079061751 counting only the distinct ones).

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

Adding to 2121112100120 its reverse (210012111212), we get a palindrome (2331124211332).

The spelling of 2121112100120 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, one hundred thousand, one hundred twenty".