2121121220112 has 120 divisors (see below), whose sum is σ = 6254428512384. Its totient is φ = 669733396992.

The previous prime is 2121121220047. The next prime is 2121121220123. The reversal of 2121121220112 is 2110221211212.

2121121220112 is a `hidden beast` number, since 212 + 1 + 121 + 220 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2767773 + ... + 3450044.

Almost surely, 2^{2121121220112} is an apocalyptic number.

It is an amenable number.

2121121220112 is an abundant number, since it is smaller than the sum of its proper divisors (4133307292272).

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

2121121220112 is a wasteful number, since it uses less digits than its factorization.

2121121220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217957 (or 6217948 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2121121220112 its reverse (2110221211212), we get a palindrome (4231342431324).

The spelling of 2121121220112 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twelve".