11212211123321 has 4 divisors (see below), whose sum is σ = 12074688902052. Its totient is φ = 10349733344592.

The previous prime is 11212211123317. The next prime is 11212211123327. The reversal of 11212211123321 is 12332111221211.

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 880615204921 + 10331595918400 = 938411^2 + 3214280^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212211123321 - 2² = 11212211123317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212211123327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431238889346 + ... + 431238889371.

It is an arithmetic number, because the mean of its divisors is an integer number (3018672225513).

Almost surely, 2^{11212211123321} is an apocalyptic number.

It is an amenable number.

11212211123321 is a deficient number, since it is larger than the sum of its proper divisors (862477778731).

11212211123321 is an equidigital number, since it uses as much as digits as its factorization.

11212211123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862477778730.

The product of its digits is 288, while the sum is 23.

Adding to 11212211123321 its reverse (12332111221211), we get a palindrome (23544322344532).

The spelling of 11212211123321 in words is "eleven trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-three thousand, three hundred twenty-one".