202231221 has 8 divisors (see below), whose sum is σ = 269720544. Its totient is φ = 134781360.

The previous prime is 202231207. The next prime is 202231247. The reversal of 202231221 is 122132202.

It is a happy number.

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

It is not a de Polignac number, because 202231221 - 2¹⁵ = 202198453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202231261) 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, 5526 + ... + 20856.

It is an arithmetic number, because the mean of its divisors is an integer number (33715068).

Almost surely, 2^202231221 is an apocalyptic number.

It is an amenable number.

202231221 is a deficient number, since it is larger than the sum of its proper divisors (67489323).

202231221 is a wasteful number, since it uses less digits than its factorization.

202231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19731.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 202231221 is about 14220.8024035214. The cubic root of 202231221 is about 586.9702202252.

Adding to 202231221 its reverse (122132202), we get a palindrome (324363423).

The spelling of 202231221 in words is "two hundred two million, two hundred thirty-one thousand, two hundred twenty-one".