21201002112211 has 4 divisors (see below), whose sum is σ = 21201012813832. Its totient is φ = 21200991410592.

The previous prime is 21201002112197. The next prime is 21201002112221. The reversal of 21201002112211 is 11221120010212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21201002112211 - 2⁹ = 21201002111699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201002112221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1413345 + ... + 6663298.

It is an arithmetic number, because the mean of its divisors is an integer number (5300253203458).

Almost surely, 2^{21201002112211} is an apocalyptic number.

21201002112211 is a deficient number, since it is larger than the sum of its proper divisors (10701621).

21201002112211 is an equidigital number, since it uses as much as digits as its factorization.

21201002112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10701620.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21201002112211 its reverse (11221120010212), we get a palindrome (32422122122423).

The spelling of 21201002112211 in words is "twenty-one trillion, two hundred one billion, two million, one hundred twelve thousand, two hundred eleven".