102201221 has 4 divisors (see below), whose sum is σ = 102534432. Its totient is φ = 101868012.

The previous prime is 102201217. The next prime is 102201227. The reversal of 102201221 is 122102201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102201221 - 2² = 102201217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166145 + ... + 166758.

It is an arithmetic number, because the mean of its divisors is an integer number (25633608).

Almost surely, 2^102201221 is an apocalyptic number.

It is an amenable number.

102201221 is a deficient number, since it is larger than the sum of its proper divisors (333211).

102201221 is an equidigital number, since it uses as much as digits as its factorization.

102201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333210.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 102201221 is about 10109.4619540310. The cubic root of 102201221 is about 467.5399163302.

Adding to 102201221 its reverse (122102201), we get a palindrome (224303422).

The spelling of 102201221 in words is "one hundred two million, two hundred one thousand, two hundred twenty-one".