22232212221 has 16 divisors (see below), whose sum is σ = 30099531968. Its totient is φ = 14593392000.

The previous prime is 22232212207. The next prime is 22232212241. The reversal of 22232212221 is 12221223222.

It is not a de Polignac number, because 22232212221 - 2⁹ = 22232211709 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 (22232212241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421521 + ... + 471321.

It is an arithmetic number, because the mean of its divisors is an integer number (1881220748).

Almost surely, 2^22232212221 is an apocalyptic number.

It is an amenable number.

22232212221 is a deficient number, since it is larger than the sum of its proper divisors (7867319747).

22232212221 is a wasteful number, since it uses less digits than its factorization.

22232212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52092.

The product of its digits is 768, while the sum is 21.

Adding to 22232212221 its reverse (12221223222), we get a palindrome (34453435443).

The spelling of 22232212221 in words is "twenty-two billion, two hundred thirty-two million, two hundred twelve thousand, two hundred twenty-one".