21000002312112 has 20 divisors (see below), whose sum is σ = 54250005973080. Its totient is φ = 7000000770688.

The previous prime is 21000002312059. The next prime is 21000002312129. The reversal of 21000002312112 is 21121320000012.

It is a junction number, because it is equal to n+sod(n) for n = 21000002312091 and 21000002312100.

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 3 ways as a sum of consecutive naturals, for example, 218750024037 + ... + 218750024132.

It is an arithmetic number, because the mean of its divisors is an integer number (2712500298654).

Almost surely, 2^{21000002312112} is an apocalyptic number.

It is an amenable number.

21000002312112 is an abundant number, since it is smaller than the sum of its proper divisors (33250003660968).

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

21000002312112 is a wasteful number, since it uses less digits than its factorization.

21000002312112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437500048180 (or 437500048174 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21000002312112 its reverse (21121320000012), we get a palindrome (42121322312124).

The spelling of 21000002312112 in words is "twenty-one trillion, two million, three hundred twelve thousand, one hundred twelve".