21020000210112 has 56 divisors (see below), whose sum is σ = 55615860183856. Its totient is φ = 7006610930688.

The previous prime is 21020000210107. The next prime is 21020000210141. The reversal of 21020000210112 is 21101200002012.

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

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 7 ways as a sum of consecutive naturals, for example, 28838838 + ... + 29558730.

It is an arithmetic number, because the mean of its divisors is an integer number (993140360426).

Almost surely, 2^{21020000210112} is an apocalyptic number.

It is an amenable number.

21020000210112 is an abundant number, since it is smaller than the sum of its proper divisors (34595859973744).

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

21020000210112 is a wasteful number, since it uses less digits than its factorization.

21020000210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871985 (or 871975 counting only the distinct ones).

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

Adding to 21020000210112 its reverse (21101200002012), we get a palindrome (42121200212124).

The spelling of 21020000210112 in words is "twenty-one trillion, twenty billion, two hundred ten thousand, one hundred twelve".