21212000021211 has 8 divisors (see below), whose sum is σ = 28532955781200. Its totient is φ = 14016188804352.

The previous prime is 21212000021203. The next prime is 21212000021243. The reversal of 21212000021211 is 11212000021212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21212000021211 - 2³ = 21212000021203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212000021111) 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, 31286135386 + ... + 31286136063.

It is an arithmetic number, because the mean of its divisors is an integer number (3566619472650).

Almost surely, 2^{21212000021211} is an apocalyptic number.

21212000021211 is a deficient number, since it is larger than the sum of its proper divisors (7320955759989).

21212000021211 is a wasteful number, since it uses less digits than its factorization.

21212000021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62572271565.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21212000021211 its reverse (11212000021212), we get a palindrome (32424000042423).

Subtracting from 21212000021211 its reverse (11212000021212), we obtain a palindrome (9999999999999).

The spelling of 21212000021211 in words is "twenty-one trillion, two hundred twelve billion, twenty-one thousand, two hundred eleven".