102013221 has 4 divisors (see below), whose sum is σ = 136017632. Its totient is φ = 68008812.

The previous prime is 102013217. The next prime is 102013259. The reversal of 102013221 is 122310201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 102013221 - 2² = 102013217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102013197 and 102013206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102013201) 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 3 ways as a sum of consecutive naturals, for example, 17002201 + ... + 17002206.

It is an arithmetic number, because the mean of its divisors is an integer number (34004408).

Almost surely, 2^102013221 is an apocalyptic number.

It is an amenable number.

102013221 is a deficient number, since it is larger than the sum of its proper divisors (34004411).

102013221 is an equidigital number, since it uses as much as digits as its factorization.

102013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34004410.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102013221 is about 10100.1594541868. The cubic root of 102013221 is about 467.2530591719.

Adding to 102013221 its reverse (122310201), we get a palindrome (224323422).

It can be divided in two parts, 1020 and 13221, that added together give a palindrome (14241).

The spelling of 102013221 in words is "one hundred two million, thirteen thousand, two hundred twenty-one".