102220321 has 12 divisors (see below), whose sum is σ = 119120880. Its totient is φ = 87461640.

The previous prime is 102220297. The next prime is 102220343. The reversal of 102220321 is 123022201.

It is not a de Polignac number, because 102220321 - 2⁷ = 102220193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102220351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32350 + ... + 35368.

It is an arithmetic number, because the mean of its divisors is an integer number (9926740).

Almost surely, 2^102220321 is an apocalyptic number.

It is an amenable number.

102220321 is a deficient number, since it is larger than the sum of its proper divisors (16900559).

102220321 is an equidigital number, since it uses as much as digits as its factorization.

102220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724 (or 3717 counting only the distinct ones).

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

The square root of 102220321 is about 10110.4065694709. The cubic root of 102220321 is about 467.5690401054.

Adding to 102220321 its reverse (123022201), we get a palindrome (225242522).

The spelling of 102220321 in words is "one hundred two million, two hundred twenty thousand, three hundred twenty-one".