22213031221 has 8 divisors (see below), whose sum is σ = 22363729920. Its totient is φ = 22062543408.

The previous prime is 22213031177. The next prime is 22213031257. The reversal of 22213031221 is 12213031222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22213031221 - 2¹¹ = 22213029173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22213031021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161595 + ... + 265591.

It is an arithmetic number, because the mean of its divisors is an integer number (2795466240).

Almost surely, 2^22213031221 is an apocalyptic number.

It is an amenable number.

22213031221 is a deficient number, since it is larger than the sum of its proper divisors (150698699).

22213031221 is a wasteful number, since it uses less digits than its factorization.

22213031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105443.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22213031221 its reverse (12213031222), we get a palindrome (34426062443).

Subtracting from 22213031221 its reverse (12213031222), we obtain a palindrome (9999999999).

The spelling of 22213031221 in words is "twenty-two billion, two hundred thirteen million, thirty-one thousand, two hundred twenty-one".