11331110321021 has 4 divisors (see below), whose sum is σ = 11331120800700. Its totient is φ = 11331099841344.

The previous prime is 11331110320979. The next prime is 11331110321077. The reversal of 11331110321021 is 12012301113311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4205739624100 + 7125370696921 = 2050790^2 + 2669339^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331110321021 - 2²⁶ = 11331043212157 is a prime.

It is a super-2 number, since 2×11331110321021² (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 = 11331110320984 and 11331110321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331110321081) 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, 3403436 + ... + 5851973.

It is an arithmetic number, because the mean of its divisors is an integer number (2832780200175).

Almost surely, 2^{11331110321021} is an apocalyptic number.

It is an amenable number.

11331110321021 is a deficient number, since it is larger than the sum of its proper divisors (10479679).

11331110321021 is an equidigital number, since it uses as much as digits as its factorization.

11331110321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10479678.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 11331110321021 its reverse (12012301113311), we get a palindrome (23343411434332).

The spelling of 11331110321021 in words is "eleven trillion, three hundred thirty-one billion, one hundred ten million, three hundred twenty-one thousand, twenty-one".