22141221 has 8 divisors (see below), whose sum is σ = 29575104. Its totient is φ = 14734080.

The previous prime is 22141211. The next prime is 22141241. The reversal of 22141221 is 12214122.

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

It is not a de Polignac number, because 22141221 - 2⁹ = 22140709 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22141221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22141201) 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, 4665 + ... + 8126.

It is an arithmetic number, because the mean of its divisors is an integer number (3696888).

Almost surely, 2^22141221 is an apocalyptic number.

It is an amenable number.

22141221 is a deficient number, since it is larger than the sum of its proper divisors (7433883).

22141221 is a wasteful number, since it uses less digits than its factorization.

22141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13371.

The product of its digits is 64, while the sum is 15.

The square root of 22141221 is about 4705.4458874797. The cubic root of 22141221 is about 280.8022104963.

Adding to 22141221 its reverse (12214122), we get a palindrome (34355343).

The spelling of 22141221 in words is "twenty-two million, one hundred forty-one thousand, two hundred twenty-one".