21201133121211 has 32 divisors (see below), whose sum is σ = 28440020044800. Its totient is φ = 14048494194816.

The previous prime is 21201133121149. The next prime is 21201133121243. The reversal of 21201133121211 is 11212133110212.

It is not a de Polignac number, because 21201133121211 - 2¹⁰ = 21201133120187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201133121411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452248105 + ... + 452294981.

It is an arithmetic number, because the mean of its divisors is an integer number (888750626400).

Almost surely, 2^{21201133121211} is an apocalyptic number.

21201133121211 is a deficient number, since it is larger than the sum of its proper divisors (7238886923589).

21201133121211 is a wasteful number, since it uses less digits than its factorization.

21201133121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48603.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 21201133121211 its reverse (11212133110212), we get a palindrome (32413266231423).

The spelling of 21201133121211 in words is "twenty-one trillion, two hundred one billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred eleven".