11331212302121 has 4 divisors (see below), whose sum is σ = 11331219049044. Its totient is φ = 11331205555200.

The previous prime is 11331212302099. The next prime is 11331212302139. The reversal of 11331212302121 is 12120321213311.

It is a happy number.

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 7805379903721 + 3525832398400 = 2793811^2 + 1877720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331212302121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331212302021) 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, 1354601 + ... + 4949481.

It is an arithmetic number, because the mean of its divisors is an integer number (2832804762261).

Almost surely, 2^{11331212302121} is an apocalyptic number.

It is an amenable number.

11331212302121 is a deficient number, since it is larger than the sum of its proper divisors (6746923).

11331212302121 is an equidigital number, since it uses as much as digits as its factorization.

11331212302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746922.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11331212302121 its reverse (12120321213311), we get a palindrome (23451533515432).

The spelling of 11331212302121 in words is "eleven trillion, three hundred thirty-one billion, two hundred twelve million, three hundred two thousand, one hundred twenty-one".