102203221 has 4 divisors (see below), whose sum is σ = 105727500. Its totient is φ = 98678944.

The previous prime is 102203219. The next prime is 102203251. The reversal of 102203221 is 122302201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30140100 + 72063121 = 5490^2 + 8489^2 .

It is a cyclic number.

It is not a de Polignac number, because 102203221 - 2¹ = 102203219 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 (102203251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762096 + ... + 1762153.

It is an arithmetic number, because the mean of its divisors is an integer number (26431875).

Almost surely, 2^102203221 is an apocalyptic number.

It is an amenable number.

102203221 is a deficient number, since it is larger than the sum of its proper divisors (3524279).

102203221 is an equidigital number, since it uses as much as digits as its factorization.

102203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524278.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102203221 is about 10109.5608707797. The cubic root of 102203221 is about 467.5429661102.

Adding to 102203221 its reverse (122302201), we get a palindrome (224505422).

The spelling of 102203221 in words is "one hundred two million, two hundred three thousand, two hundred twenty-one".