21001110212 has 12 divisors (see below), whose sum is σ = 36753056256. Its totient is φ = 10500237000.

The previous prime is 21001110209. The next prime is 21001110223. The reversal of 21001110212 is 21201110012.

It is a junction number, because it is equal to n+sod(n) for n = 21001110193 and 21001110202.

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, 130853 + ... + 243155.

It is an arithmetic number, because the mean of its divisors is an integer number (3062754688).

Almost surely, 2^21001110212 is an apocalyptic number.

It is an amenable number.

21001110212 is a deficient number, since it is larger than the sum of its proper divisors (15751946044).

21001110212 is a wasteful number, since it uses less digits than its factorization.

21001110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159058 (or 159056 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21001110212 its reverse (21201110012), we get a palindrome (42202220224).

The spelling of 21001110212 in words is "twenty-one billion, one million, one hundred ten thousand, two hundred twelve".