11331131320121 has 4 divisors (see below), whose sum is σ = 11331157814244. Its totient is φ = 11331104826000.

The previous prime is 11331131320037. The next prime is 11331131320139. The reversal of 11331131320121 is 12102313113311.

11331131320121 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 6614463859600 + 4716667460521 = 2571860^2 + 2171789^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331131320121 - 2²² = 11331127125817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331131325121) 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, 12594830 + ... + 13464471.

It is an arithmetic number, because the mean of its divisors is an integer number (2832789453561).

Almost surely, 2^{11331131320121} is an apocalyptic number.

It is an amenable number.

11331131320121 is a deficient number, since it is larger than the sum of its proper divisors (26494123).

11331131320121 is an equidigital number, since it uses as much as digits as its factorization.

11331131320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26494122.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 11331131320121 its reverse (12102313113311), we get a palindrome (23433444433432).

The spelling of 11331131320121 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, three hundred twenty thousand, one hundred twenty-one".