11331123213021 has 4 divisors (see below), whose sum is σ = 15108164284032. Its totient is φ = 7554082142012.

The previous prime is 11331123213001. The next prime is 11331123213029. The reversal of 11331123213021 is 12031232113311.

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 11331123213021 - 2¹⁸ = 11331122950877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11331123212982 and 11331123213000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331123213029) 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, 1888520535501 + ... + 1888520535506.

It is an arithmetic number, because the mean of its divisors is an integer number (3777041071008).

Almost surely, 2^{11331123213021} is an apocalyptic number.

It is an amenable number.

11331123213021 is a deficient number, since it is larger than the sum of its proper divisors (3777041071011).

11331123213021 is an equidigital number, since it uses as much as digits as its factorization.

11331123213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777041071010.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 11331123213021 its reverse (12031232113311), we get a palindrome (23362355326332).

The spelling of 11331123213021 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-three million, two hundred thirteen thousand, twenty-one".