11221222210321 has 4 divisors (see below), whose sum is σ = 11221236670644. Its totient is φ = 11221207750000.

The previous prime is 11221222210309. The next prime is 11221222210337. The reversal of 11221222210321 is 12301222212211.

11221222210321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 402971040000 + 10818251170321 = 634800^2 + 3289111^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221222210321 - 2²⁷ = 11221087992593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221222210292 and 11221222210301.

It is not an unprimeable number, because it can be changed into a prime (11221222210381) 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, 5995930 + ... + 7641571.

It is an arithmetic number, because the mean of its divisors is an integer number (2805309167661).

Almost surely, 2^{11221222210321} is an apocalyptic number.

It is an amenable number.

11221222210321 is a deficient number, since it is larger than the sum of its proper divisors (14460323).

11221222210321 is an equidigital number, since it uses as much as digits as its factorization.

11221222210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14460322.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 11221222210321 its reverse (12301222212211), we get a palindrome (23522444422532).

The spelling of 11221222210321 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, three hundred twenty-one".