11001202121221 has 16 divisors (see below), whose sum is σ = 12471227576640. Its totient is φ = 9620307619200.

The previous prime is 11001202121219. The next prime is 11001202121227. The reversal of 11001202121221 is 12212120210011.

It is a cyclic number.

It is not a de Polignac number, because 11001202121221 - 2¹ = 11001202121219 is a prime.

It is a super-2 number, since 2×11001202121221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001202121195 and 11001202121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001202121227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14094426 + ... + 14854468.

It is an arithmetic number, because the mean of its divisors is an integer number (779451723540).

Almost surely, 2^{11001202121221} is an apocalyptic number.

It is an amenable number.

11001202121221 is a deficient number, since it is larger than the sum of its proper divisors (1470025455419).

11001202121221 is a wasteful number, since it uses less digits than its factorization.

11001202121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818676.

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

Adding to 11001202121221 its reverse (12212120210011), we get a palindrome (23213322331232).

The spelling of 11001202121221 in words is "eleven trillion, one billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-one".