21020100002112 has 56 divisors (see below), whose sum is σ = 55739547144000. Its totient is φ = 6991094849536.

The previous prime is 21020100002107. The next prime is 21020100002183. The reversal of 21020100002112 is 21120000102012.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121828812 + ... + 122001227.

Almost surely, 2^{21020100002112} is an apocalyptic number.

It is an amenable number.

21020100002112 is an abundant number, since it is smaller than the sum of its proper divisors (34719447141888).

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

21020100002112 is a wasteful number, since it uses less digits than its factorization.

21020100002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243830503 (or 243830493 counting only the distinct ones).

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

Adding to 21020100002112 its reverse (21120000102012), we get a palindrome (42140100104124).

The spelling of 21020100002112 in words is "twenty-one trillion, twenty billion, one hundred million, two thousand, one hundred twelve".