11111320333021 has 4 divisors (see below), whose sum is σ = 11764927411452. Its totient is φ = 10457713254592.

The previous prime is 11111320333007. The next prime is 11111320333033. The reversal of 11111320333021 is 12033302311111.

11111320333021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3434757956100 + 7676562376921 = 1853310^2 + 2770661^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111320333021 - 2¹¹ = 11111320330973 is a prime.

It is a super-3 number, since 3×11111320333021³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111320332983 and 11111320333001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111320333621) 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, 326803539190 + ... + 326803539223.

It is an arithmetic number, because the mean of its divisors is an integer number (2941231852863).

Almost surely, 2^{11111320333021} is an apocalyptic number.

It is an amenable number.

11111320333021 is a deficient number, since it is larger than the sum of its proper divisors (653607078431).

11111320333021 is an equidigital number, since it uses as much as digits as its factorization.

11111320333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653607078430.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 11111320333021 its reverse (12033302311111), we get a palindrome (23144622644132).

The spelling of 11111320333021 in words is "eleven trillion, one hundred eleven billion, three hundred twenty million, three hundred thirty-three thousand, twenty-one".