20103221 has 8 divisors (see below), whose sum is σ = 21093888. Its totient is φ = 19134000.

The previous prime is 20103203. The next prime is 20103241. The reversal of 20103221 is 12230102.

It is a happy number.

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 20103221 - 2⁶ = 20103157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103241) 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, 3425 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (2636736).

Almost surely, 2^20103221 is an apocalyptic number.

It is an amenable number.

20103221 is a deficient number, since it is larger than the sum of its proper divisors (990667).

20103221 is a wasteful number, since it uses less digits than its factorization.

20103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10723.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20103221 is about 4483.6615617149. The cubic root of 20103221 is about 271.9079354295.

Adding to 20103221 its reverse (12230102), we get a palindrome (32333323).

The spelling of 20103221 in words is "twenty million, one hundred three thousand, two hundred twenty-one".