11331123320021 has 4 divisors (see below), whose sum is σ = 11342113741344. Its totient is φ = 11320132898700.

The previous prime is 11331123319969. The next prime is 11331123320057. The reversal of 11331123320021 is 12002332113311.

11331123320021 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11331123320021 - 2¹⁰ = 11331123318997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331128320021) 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, 5495209115 + ... + 5495211176.

It is an arithmetic number, because the mean of its divisors is an integer number (2835528435336).

Almost surely, 2^{11331123320021} is an apocalyptic number.

It is an amenable number.

11331123320021 is a deficient number, since it is larger than the sum of its proper divisors (10990421323).

11331123320021 is a wasteful number, since it uses less digits than its factorization.

11331123320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990421322.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 11331123320021 its reverse (12002332113311), we get a palindrome (23333455433332).

The spelling of 11331123320021 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-three million, three hundred twenty thousand, twenty-one".