11221020202121 has 16 divisors (see below), whose sum is σ = 11395835193600. Its totient is φ = 11047605873408.

The previous prime is 11221020201997. The next prime is 11221020202207. The reversal of 11221020202121 is 12120202012211.

It is a cyclic number.

It is not a de Polignac number, because 11221020202121 - 2³⁸ = 10946142295177 is a prime.

It is a super-2 number, since 2×11221020202121² (a number of 27 digits) contains 22 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 11221020202121.

It is not an unprimeable number, because it can be changed into a prime (11221020205121) 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, 25674401 + ... + 26107793.

It is an arithmetic number, because the mean of its divisors is an integer number (712239699600).

Almost surely, 2^{11221020202121} is an apocalyptic number.

It is an amenable number.

11221020202121 is a deficient number, since it is larger than the sum of its proper divisors (174814991479).

11221020202121 is a wasteful number, since it uses less digits than its factorization.

11221020202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435008.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11221020202121 its reverse (12120202012211), we get a palindrome (23341222214332).

The spelling of 11221020202121 in words is "eleven trillion, two hundred twenty-one billion, twenty million, two hundred two thousand, one hundred twenty-one".