21200100110212 has 6 divisors (see below), whose sum is σ = 37100175192878. Its totient is φ = 10600050055104.

The previous prime is 21200100110201. The next prime is 21200100110243. The reversal of 21200100110212 is 21201100100212.

It can be written as a sum of positive squares in only one way, i.e., 19329950869056 + 1870149241156 = 4396584^2 + 1367534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21200100110192 and 21200100110201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2650012513773 + ... + 2650012513780.

Almost surely, 2^{21200100110212} is an apocalyptic number.

It is an amenable number.

21200100110212 is a deficient number, since it is larger than the sum of its proper divisors (15900075082666).

21200100110212 is a wasteful number, since it uses less digits than its factorization.

21200100110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300025027557 (or 5300025027555 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200100110212 its reverse (21201100100212), we get a palindrome (42401200210424).

The spelling of 21200100110212 in words is "twenty-one trillion, two hundred billion, one hundred million, one hundred ten thousand, two hundred twelve".