11021201112221 has 4 divisors (see below), whose sum is σ = 11030377800444. Its totient is φ = 11012024424000.

The previous prime is 11021201112203. The next prime is 11021201112253. The reversal of 11021201112221 is 12221110212011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5584194348100 + 5437006764121 = 2363090^2 + 2331739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021201112221 is a prime.

It is a super-3 number, since 3×11021201112221³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11021201112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021201112421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4588342310 + ... + 4588344711.

It is an arithmetic number, because the mean of its divisors is an integer number (2757594450111).

Almost surely, 2^{11021201112221} is an apocalyptic number.

It is an amenable number.

11021201112221 is a deficient number, since it is larger than the sum of its proper divisors (9176688223).

11021201112221 is an equidigital number, since it uses as much as digits as its factorization.

11021201112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9176688222.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11021201112221 its reverse (12221110212011), we get a palindrome (23242311324232).

The spelling of 11021201112221 in words is "eleven trillion, twenty-one billion, two hundred one million, one hundred twelve thousand, two hundred twenty-one".