22011321 has 4 divisors (see below), whose sum is σ = 29348432. Its totient is φ = 14674212.

The previous prime is 22011293. The next prime is 22011331. The reversal of 22011321 is 12311022.

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 not a de Polignac number, because 22011321 - 2¹³ = 22003129 is a prime.

It is a super-3 number, since 3×22011321³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011297 and 22011306.

It is not an unprimeable number, because it can be changed into a prime (22011331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3668551 + ... + 3668556.

It is an arithmetic number, because the mean of its divisors is an integer number (7337108).

Almost surely, 2^22011321 is an apocalyptic number.

It is an amenable number.

22011321 is a deficient number, since it is larger than the sum of its proper divisors (7337111).

22011321 is an equidigital number, since it uses as much as digits as its factorization.

22011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7337110.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 22011321 is about 4691.6224272633. The cubic root of 22011321 is about 280.2519882891.

Adding to 22011321 its reverse (12311022), we get a palindrome (34322343).

The spelling of 22011321 in words is "twenty-two million, eleven thousand, three hundred twenty-one".