21221001201201 has 8 divisors (see below), whose sum is σ = 28294696077600. Its totient is φ = 14147320229472.

The previous prime is 21221001201167. The next prime is 21221001201223. The reversal of 21221001201201 is 10210210012212.

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

It is not a de Polignac number, because 21221001201201 - 2²¹ = 21220999104049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21221001201241) 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, 856306 + ... + 6570788.

It is an arithmetic number, because the mean of its divisors is an integer number (3536837009700).

Almost surely, 2^{21221001201201} is an apocalyptic number.

It is an amenable number.

21221001201201 is a deficient number, since it is larger than the sum of its proper divisors (7073694876399).

21221001201201 is a wasteful number, since it uses less digits than its factorization.

21221001201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6952335.

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

Adding to 21221001201201 its reverse (10210210012212), we get a palindrome (31431211213413).

The spelling of 21221001201201 in words is "twenty-one trillion, two hundred twenty-one billion, one million, two hundred one thousand, two hundred one".