22198121 has 8 divisors (see below), whose sum is σ = 24266304. Its totient is φ = 20138320.

The previous prime is 22198117. The next prime is 22198123. The reversal of 22198121 is 12189122.

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 22198121 - 2² = 22198117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22198123) 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, 4316 + ... + 7938.

It is an arithmetic number, because the mean of its divisors is an integer number (3033288).

Almost surely, 2^22198121 is an apocalyptic number.

It is an amenable number.

22198121 is a deficient number, since it is larger than the sum of its proper divisors (2068183).

22198121 is a wasteful number, since it uses less digits than its factorization.

22198121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191.

The product of its digits is 576, while the sum is 26.

The square root of 22198121 is about 4711.4881937664. The cubic root of 22198121 is about 281.0425462103.

The spelling of 22198121 in words is "twenty-two million, one hundred ninety-eight thousand, one hundred twenty-one".