11213322221 has 4 divisors (see below), whose sum is σ = 11219475072. Its totient is φ = 11207169372.

The previous prime is 11213322217. The next prime is 11213322223. The reversal of 11213322221 is 12222331211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12222331211 = 109 ⋅112131479.

It is a cyclic number.

It is not a de Polignac number, because 11213322221 - 2² = 11213322217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11213322193 and 11213322202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213322223) 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, 3073691 + ... + 3077336.

It is an arithmetic number, because the mean of its divisors is an integer number (2804868768).

Almost surely, 2^11213322221 is an apocalyptic number.

It is an amenable number.

11213322221 is a deficient number, since it is larger than the sum of its proper divisors (6152851).

11213322221 is an equidigital number, since it uses as much as digits as its factorization.

11213322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152850.

The product of its digits is 288, while the sum is 20.

Adding to 11213322221 its reverse (12222331211), we get a palindrome (23435653432).

The spelling of 11213322221 in words is "eleven billion, two hundred thirteen million, three hundred twenty-two thousand, two hundred twenty-one".