11212210321 has 4 divisors (see below), whose sum is σ = 12074688052. Its totient is φ = 10349732592.

The previous prime is 11212210301. The next prime is 11212210343. The reversal of 11212210321 is 12301221211.

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 2987715600 + 8224494721 = 54660^2 + 90689^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212210321 - 2²⁵ = 11178655889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212210295 and 11212210304.

It is not an unprimeable number, because it can be changed into a prime (11212210301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431238846 + ... + 431238871.

It is an arithmetic number, because the mean of its divisors is an integer number (3018672013).

Almost surely, 2^11212210321 is an apocalyptic number.

It is an amenable number.

11212210321 is a deficient number, since it is larger than the sum of its proper divisors (862477731).

11212210321 is an equidigital number, since it uses as much as digits as its factorization.

11212210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862477730.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11212210321 its reverse (12301221211), we get a palindrome (23513431532).

The spelling of 11212210321 in words is "eleven billion, two hundred twelve million, two hundred ten thousand, three hundred twenty-one".