21200355112 has 48 divisors (see below), whose sum is σ = 42149576700. Its totient is φ = 9984844800.

The previous prime is 21200355109. The next prime is 21200355131. The reversal of 21200355112 is 21155300212.

It can be written as a sum of positive squares in 6 ways, for example, as 1574026276 + 19626328836 = 39674^2 + 140094^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 362812 + ... + 417172.

Almost surely, 2^21200355112 is an apocalyptic number.

It is an amenable number.

21200355112 is a deficient number, since it is larger than the sum of its proper divisors (20949221588).

21200355112 is a wasteful number, since it uses less digits than its factorization.

21200355112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54478 (or 54433 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 21200355112 its reverse (21155300212), we get a palindrome (42355655324).

The spelling of 21200355112 in words is "twenty-one billion, two hundred million, three hundred fifty-five thousand, one hundred twelve".