11001201022221 has 8 divisors (see below), whose sum is σ = 14669720517600. Its totient is φ = 7333407770832.

The previous prime is 11001201022213. The next prime is 11001201022237. The reversal of 11001201022221 is 12222010210011.

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

It is not a de Polignac number, because 11001201022221 - 2³ = 11001201022213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11001201022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001201022211) 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, 181525650 + ... + 181586243.

It is an arithmetic number, because the mean of its divisors is an integer number (1833715064700).

Almost surely, 2^{11001201022221} is an apocalyptic number.

It is an amenable number.

11001201022221 is a deficient number, since it is larger than the sum of its proper divisors (3668519495379).

11001201022221 is a wasteful number, since it uses less digits than its factorization.

11001201022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363121995.

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

Adding to 11001201022221 its reverse (12222010210011), we get a palindrome (23223211232232).

The spelling of 11001201022221 in words is "eleven trillion, one billion, two hundred one million, twenty-two thousand, two hundred twenty-one".