2121000020112 has 80 divisors (see below), whose sum is σ = 5775136885440. Its totient is φ = 669741037056.

The previous prime is 2121000020107. The next prime is 2121000020123. The reversal of 2121000020112 is 2110200001212.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 15 ways as a sum of consecutive naturals, for example, 14300818 + ... + 14448369.

It is an arithmetic number, because the mean of its divisors is an integer number (72189211068).

Almost surely, 2^{2121000020112} is an apocalyptic number.

It is an amenable number.

2121000020112 is an abundant number, since it is smaller than the sum of its proper divisors (3654136865328).

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

2121000020112 is a wasteful number, since it uses less digits than its factorization.

2121000020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28749280 (or 28749274 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2121000020112 its reverse (2110200001212), we get a palindrome (4231200021324).

The spelling of 2121000020112 in words is "two trillion, one hundred twenty-one billion, twenty thousand, one hundred twelve".