21230021112 has 16 divisors (see below), whose sum is σ = 53075052840. Its totient is φ = 7076673696.

The previous prime is 21230021093. The next prime is 21230021143. The reversal of 21230021112 is 21112003212.

It is a junction number, because it is equal to n+sod(n) for n = 21230021091 and 21230021100.

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, 442292083 + ... + 442292130.

Almost surely, 2^21230021112 is an apocalyptic number.

It is an amenable number.

21230021112 is an abundant number, since it is smaller than the sum of its proper divisors (31845031728).

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

21230021112 is a wasteful number, since it uses less digits than its factorization.

21230021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884584222 (or 884584218 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21230021112 its reverse (21112003212), we get a palindrome (42342024324).

The spelling of 21230021112 in words is "twenty-one billion, two hundred thirty million, twenty-one thousand, one hundred twelve".