21221200011201 has 32 divisors (see below), whose sum is σ = 29410040217600. Its totient is φ = 13596276868800.

The previous prime is 21221200011199. The next prime is 21221200011251. The reversal of 21221200011201 is 10211000212212.

It is not a de Polignac number, because 21221200011201 - 2¹ = 21221200011199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221200011251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65006656 + ... + 65332286.

It is an arithmetic number, because the mean of its divisors is an integer number (919063756800).

Almost surely, 2^{21221200011201} is an apocalyptic number.

It is an amenable number.

21221200011201 is a deficient number, since it is larger than the sum of its proper divisors (8188840206399).

21221200011201 is a wasteful number, since it uses less digits than its factorization.

21221200011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330517.

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

Adding to 21221200011201 its reverse (10211000212212), we get a palindrome (31432200223413).

The spelling of 21221200011201 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred million, eleven thousand, two hundred one".