11221212211321 has 4 divisors (see below), whose sum is σ = 12824242527232. Its totient is φ = 9618181895412.

The previous prime is 11221212211271. The next prime is 11221212211327. The reversal of 11221212211321 is 12311221212211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11221212211321 - 2²⁵ = 11221178656889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221212211292 and 11221212211301.

It is not an unprimeable number, because it can be changed into a prime (11221212211327) 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, 801515157945 + ... + 801515157958.

It is an arithmetic number, because the mean of its divisors is an integer number (3206060631808).

Almost surely, 2^{11221212211321} is an apocalyptic number.

It is an amenable number.

11221212211321 is a deficient number, since it is larger than the sum of its proper divisors (1603030315911).

11221212211321 is an equidigital number, since it uses as much as digits as its factorization.

11221212211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603030315910.

The product of its digits is 192, while the sum is 22.

Adding to 11221212211321 its reverse (12311221212211), we get a palindrome (23532433423532).

The spelling of 11221212211321 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, three hundred twenty-one".