11431304020121 has 4 divisors (see below), whose sum is σ = 11432723536932. Its totient is φ = 11429884503312.

The previous prime is 11431304020117. The next prime is 11431304020139. The reversal of 11431304020121 is 12102040313411.

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 9347914894096 + 2083389126025 = 3057436^2 + 1443395^2 .

It is a cyclic number.

It is not a de Polignac number, because 11431304020121 - 2² = 11431304020117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11431304220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709746326 + ... + 709762431.

It is an arithmetic number, because the mean of its divisors is an integer number (2858180884233).

Almost surely, 2^{11431304020121} is an apocalyptic number.

It is an amenable number.

11431304020121 is a deficient number, since it is larger than the sum of its proper divisors (1419516811).

11431304020121 is an equidigital number, since it uses as much as digits as its factorization.

11431304020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419516810.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 11431304020121 its reverse (12102040313411), we get a palindrome (23533344333532).

The spelling of 11431304020121 in words is "eleven trillion, four hundred thirty-one billion, three hundred four million, twenty thousand, one hundred twenty-one".