102331221 has 24 divisors (see below), whose sum is σ = 141635520. Its totient is φ = 65704320.

The previous prime is 102331213. The next prime is 102331231. The reversal of 102331221 is 122133201.

It is not a de Polignac number, because 102331221 - 2³ = 102331213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102331231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 993456 + ... + 993558.

It is an arithmetic number, because the mean of its divisors is an integer number (5901480).

Almost surely, 2^102331221 is an apocalyptic number.

It is an amenable number.

102331221 is a deficient number, since it is larger than the sum of its proper divisors (39304299).

102331221 is an equidigital number, since it uses as much as digits as its factorization.

102331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 102331221 is about 10115.8895308322. The cubic root of 102331221 is about 467.7380693330.

Adding to 102331221 its reverse (122133201), we get a palindrome (224464422).

The spelling of 102331221 in words is "one hundred two million, three hundred thirty-one thousand, two hundred twenty-one".