102123221 has 8 divisors (see below), whose sum is σ = 104448000. Its totient is φ = 99824400.

The previous prime is 102123187. The next prime is 102123223. The reversal of 102123221 is 122321201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102123221 - 2¹⁸ = 101861077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102123196 and 102123205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123223) 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 7 ways as a sum of consecutive naturals, for example, 1580 + ... + 14378.

It is an arithmetic number, because the mean of its divisors is an integer number (13056000).

Almost surely, 2^102123221 is an apocalyptic number.

It is an amenable number.

102123221 is a deficient number, since it is larger than the sum of its proper divisors (2324779).

102123221 is a wasteful number, since it uses less digits than its factorization.

102123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12979.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 102123221 is about 10105.6034456137. The cubic root of 102123221 is about 467.4209438608.

Adding to 102123221 its reverse (122321201), we get a palindrome (224444422).

It can be divided in two parts, 1021 and 23221, that added together give a palindrome (24242).

The spelling of 102123221 in words is "one hundred two million, one hundred twenty-three thousand, two hundred twenty-one".