11201021012221 has 8 divisors (see below), whose sum is σ = 11269779276600. Its totient is φ = 11132467691520.

The previous prime is 11201021012213. The next prime is 11201021012309. The reversal of 11201021012221 is 12221012010211.

It can be written as a sum of positive squares in 4 ways, for example, as 1838706168121 + 9362314844100 = 1355989^2 + 3059790^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11201021012221 - 2³ = 11201021012213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201021012195 and 11201021012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201021012521) 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, 51126276 + ... + 51344893.

It is an arithmetic number, because the mean of its divisors is an integer number (1408722409575).

Almost surely, 2^{11201021012221} is an apocalyptic number.

It is an amenable number.

11201021012221 is a deficient number, since it is larger than the sum of its proper divisors (68758264379).

11201021012221 is a wasteful number, since it uses less digits than its factorization.

11201021012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102471839.

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

Adding to 11201021012221 its reverse (12221012010211), we get a palindrome (23422033022432).

The spelling of 11201021012221 in words is "eleven trillion, two hundred one billion, twenty-one million, twelve thousand, two hundred twenty-one".