20224121 has 8 divisors (see below), whose sum is σ = 20934144. Its totient is φ = 19517760.

The previous prime is 20224117. The next prime is 20224129. The reversal of 20224121 is 12142202.

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 20224121 - 2² = 20224117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20224096 and 20224105.

It is not an unprimeable number, because it can be changed into a prime (20224129) 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, 14945 + ... + 16241.

It is an arithmetic number, because the mean of its divisors is an integer number (2616768).

Almost surely, 2^20224121 is an apocalyptic number.

It is an amenable number.

20224121 is a deficient number, since it is larger than the sum of its proper divisors (710023).

20224121 is a wasteful number, since it uses less digits than its factorization.

20224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 20224121 is about 4497.1236362813. The cubic root of 20224121 is about 272.4519276645.

Adding to 20224121 its reverse (12142202), we get a palindrome (32366323).

The spelling of 20224121 in words is "twenty million, two hundred twenty-four thousand, one hundred twenty-one".