22013321 has 4 divisors (see below), whose sum is σ = 24014544. Its totient is φ = 20012100.

The previous prime is 22013281. The next prime is 22013339. The reversal of 22013321 is 12331022.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-22013321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22013296 and 22013305.

It is not an unprimeable number, because it can be changed into a prime (22013021) 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, 1000595 + ... + 1000616.

It is an arithmetic number, because the mean of its divisors is an integer number (6003636).

Almost surely, 2^22013321 is an apocalyptic number.

It is an amenable number.

22013321 is a deficient number, since it is larger than the sum of its proper divisors (2001223).

22013321 is a wasteful number, since it uses less digits than its factorization.

22013321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001222.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 22013321 is about 4691.8355683037. The cubic root of 22013321 is about 280.2604761486.

Adding to 22013321 its reverse (12331022), we get a palindrome (34344343).

The spelling of 22013321 in words is "twenty-two million, thirteen thousand, three hundred twenty-one".