11202121221021 has 24 divisors (see below), whose sum is σ = 16276931480160. Its totient is φ = 7423760916000.

The previous prime is 11202121221017. The next prime is 11202121221047. The reversal of 11202121221021 is 12012212120211.

It is not a de Polignac number, because 11202121221021 - 2² = 11202121221017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11202121220985 and 11202121221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202121225021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3393846 + ... + 5824296.

It is an arithmetic number, because the mean of its divisors is an integer number (678205478340).

Almost surely, 2^{11202121221021} is an apocalyptic number.

It is an amenable number.

11202121221021 is a deficient number, since it is larger than the sum of its proper divisors (5074810259139).

11202121221021 is a wasteful number, since it uses less digits than its factorization.

11202121221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433497 (or 2433494 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11202121221021 its reverse (12012212120211), we get a palindrome (23214333341232).

The spelling of 11202121221021 in words is "eleven trillion, two hundred two billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-one".