21200221112 has 32 divisors (see below), whose sum is σ = 47404224000. Its totient is φ = 8690773344.

The previous prime is 21200221099. The next prime is 21200221117. The reversal of 21200221112 is 21112200212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200221117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8228612 + ... + 8231187.

It is an arithmetic number, because the mean of its divisors is an integer number (1481382000).

Almost surely, 2^21200221112 is an apocalyptic number.

It is an amenable number.

21200221112 is an abundant number, since it is smaller than the sum of its proper divisors (26204002888).

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

21200221112 is a wasteful number, since it uses less digits than its factorization.

21200221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16459835 (or 16459831 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200221112 its reverse (21112200212), we get a palindrome (42312421324).

The spelling of 21200221112 in words is "twenty-one billion, two hundred million, two hundred twenty-one thousand, one hundred twelve".