21000210012112 has 20 divisors (see below), whose sum is σ = 40692205058976. Its totient is φ = 10498995803360.

The previous prime is 21000210012079. The next prime is 21000210012143. The reversal of 21000210012112 is 21121001200012.

It is a junction number, because it is equal to n+sod(n) for n = 21000210012092 and 21000210012101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69168964 + ... + 69471907.

Almost surely, 2^{21000210012112} is an apocalyptic number.

It is an amenable number.

21000210012112 is a deficient number, since it is larger than the sum of its proper divisors (19691995046864).

21000210012112 is a wasteful number, since it uses less digits than its factorization.

21000210012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138650346 (or 138650340 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21000210012112 its reverse (21121001200012), we get a palindrome (42121211212124).

The spelling of 21000210012112 in words is "twenty-one trillion, two hundred ten million, twelve thousand, one hundred twelve".