21020100011112 has 16 divisors (see below), whose sum is σ = 52550250027840. Its totient is φ = 7006700003696.

The previous prime is 21020100011081. The next prime is 21020100011171. The reversal of 21020100011112 is 21111000102012.

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

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, 437918750208 + ... + 437918750255.

It is an arithmetic number, because the mean of its divisors is an integer number (3284390626740).

Almost surely, 2^{21020100011112} is an apocalyptic number.

It is an amenable number.

21020100011112 is an abundant number, since it is smaller than the sum of its proper divisors (31530150016728).

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

21020100011112 is a wasteful number, since it uses less digits than its factorization.

21020100011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875837500472 (or 875837500468 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21020100011112 its reverse (21111000102012), we get a palindrome (42131100113124).

The spelling of 21020100011112 in words is "twenty-one trillion, twenty billion, one hundred million, eleven thousand, one hundred twelve".