22164031221 has 8 divisors (see below), whose sum is σ = 31107412320. Its totient is φ = 13998335472.

The previous prime is 22164031217. The next prime is 22164031249. The reversal of 22164031221 is 12213046122.

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

It is not a de Polignac number, because 22164031221 - 2² = 22164031217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22164031191 and 22164031200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22164031261) 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, 194421270 + ... + 194421383.

It is an arithmetic number, because the mean of its divisors is an integer number (3888426540).

Almost surely, 2^22164031221 is an apocalyptic number.

It is an amenable number.

22164031221 is a deficient number, since it is larger than the sum of its proper divisors (8943381099).

22164031221 is a wasteful number, since it uses less digits than its factorization.

22164031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388842675.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 22164031221 its reverse (12213046122), we get a palindrome (34377077343).

The spelling of 22164031221 in words is "twenty-two billion, one hundred sixty-four million, thirty-one thousand, two hundred twenty-one".