21201222000211 has 16 divisors (see below), whose sum is σ = 23432227226208. Its totient is φ = 19022039712000.

The previous prime is 21201222000173. The next prime is 21201222000227. The reversal of 21201222000211 is 11200022210212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21201222000211 - 2³⁵ = 21166862261843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201222000911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30136296 + ... + 30831781.

It is an arithmetic number, because the mean of its divisors is an integer number (1464514201638).

Almost surely, 2^{21201222000211} is an apocalyptic number.

21201222000211 is a deficient number, since it is larger than the sum of its proper divisors (2231005225997).

21201222000211 is a wasteful number, since it uses less digits than its factorization.

21201222000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60968502.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21201222000211 its reverse (11200022210212), we get a palindrome (32401244210423).

The spelling of 21201222000211 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, two hundred eleven", and thus it is an aban number.