11321222020121 has 6 divisors (see below), whose sum is σ = 12259074732030. Its totient is φ = 10450358787648.

The previous prime is 11321222020103. The next prime is 11321222020123. The reversal of 11321222020121 is 12102022212311.

It can be written as a sum of positive squares in 3 ways, for example, as 6878877721 + 11314343142400 = 82939^2 + 3363680^2 .

It is not a de Polignac number, because 11321222020121 - 2¹⁰ = 11321222019097 is a prime.

It is a super-2 number, since 2×11321222020121² (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 = 11321222020093 and 11321222020102.

It is not an unprimeable number, because it can be changed into a prime (11321222020123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33494739536 + ... + 33494739873.

It is an arithmetic number, because the mean of its divisors is an integer number (2043179122005).

Almost surely, 2^{11321222020121} is an apocalyptic number.

It is an amenable number.

11321222020121 is a deficient number, since it is larger than the sum of its proper divisors (937852711909).

11321222020121 is an equidigital number, since it uses as much as digits as its factorization.

11321222020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66989479435 (or 66989479422 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11321222020121 its reverse (12102022212311), we get a palindrome (23423244232432).

The spelling of 11321222020121 in words is "eleven trillion, three hundred twenty-one billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".