2121030312112 has 20 divisors (see below), whose sum is σ = 4111740686416. Its totient is φ = 1059935941440.

The previous prime is 2121030312047. The next prime is 2121030312131. The reversal of 2121030312112 is 2112130301212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121030312112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36170703 + ... + 36229294.

Almost surely, 2^{2121030312112} is an apocalyptic number.

It is an amenable number.

2121030312112 is a deficient number, since it is larger than the sum of its proper divisors (1990710374304).

2121030312112 is a wasteful number, since it uses less digits than its factorization.

2121030312112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72401836 (or 72401830 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2121030312112 its reverse (2112130301212), we get a palindrome (4233160613324).

The spelling of 2121030312112 in words is "two trillion, one hundred twenty-one billion, thirty million, three hundred twelve thousand, one hundred twelve".