102363221 has 4 divisors (see below), whose sum is σ = 102468972. Its totient is φ = 102257472.

The previous prime is 102363211. The next prime is 102363251. The reversal of 102363221 is 122363201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122363201 = 197 ⋅621133.

It can be written as a sum of positive squares in 2 ways, for example, as 97022500 + 5340721 = 9850^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 102363221 - 2²⁶ = 35254357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102363193 and 102363202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102363211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51410 + ... + 53363.

It is an arithmetic number, because the mean of its divisors is an integer number (25617243).

Almost surely, 2^102363221 is an apocalyptic number.

It is an amenable number.

102363221 is a deficient number, since it is larger than the sum of its proper divisors (105751).

102363221 is an equidigital number, since it uses as much as digits as its factorization.

102363221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105750.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 102363221 is about 10117.4710772999. The cubic root of 102363221 is about 467.7868197149.

Subtracting from 102363221 its sum of digits (20), we obtain a palindrome (102363201).

The spelling of 102363221 in words is "one hundred two million, three hundred sixty-three thousand, two hundred twenty-one".