21200202112 has 16 divisors (see below), whose sum is σ = 42234777900. Its totient is φ = 10600100992.

The previous prime is 21200202077. The next prime is 21200202139. The reversal of 21200202112 is 21120200212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 21200202092 and 21200202101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82813162 + ... + 82813417.

Almost surely, 2^21200202112 is an apocalyptic number.

It is an amenable number.

21200202112 is a deficient number, since it is larger than the sum of its proper divisors (21034575788).

21200202112 is an equidigital number, since it uses as much as digits as its factorization.

21200202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165626593 (or 165626581 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21200202112 its reverse (21120200212), we get a palindrome (42320402324).

The spelling of 21200202112 in words is "twenty-one billion, two hundred million, two hundred two thousand, one hundred twelve".