21020000112 has 60 divisors (see below), whose sum is σ = 58882575024. Its totient is φ = 7000024320.

The previous prime is 21020000087. The next prime is 21020000119. The reversal of 21020000112 is 21100002012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21020000094 and 21020000103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020000119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84412 + ... + 221732.

Almost surely, 2^21020000112 is an apocalyptic number.

It is an amenable number.

21020000112 is an abundant number, since it is smaller than the sum of its proper divisors (37862574912).

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

21020000112 is a wasteful number, since it uses less digits than its factorization.

21020000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138398 (or 138389 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21020000112 its reverse (21100002012), we get a palindrome (42120002124).

The spelling of 21020000112 in words is "twenty-one billion, twenty million, one hundred twelve", and thus it is an aban number.