102221213 has 2 divisors, whose sum is σ = 102221214. Its totient is φ = 102221212.

The previous prime is 102221209. The next prime is 102221237. The reversal of 102221213 is 312122201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95981209 + 6240004 = 9797^2 + 2498^2 .

It is an emirp because it is prime and its reverse (312122201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102221213 - 2² = 102221209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102221263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110606 + 51110607.

It is an arithmetic number, because the mean of its divisors is an integer number (51110607).

Almost surely, 2^102221213 is an apocalyptic number.

It is an amenable number.

102221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221213 is an equidigital number, since it uses as much as digits as its factorization.

102221213 is an odious number, because the sum of its binary digits is odd.

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

The square root of 102221213 is about 10110.4506823385. The cubic root of 102221213 is about 467.5704001428.

Adding to 102221213 its reverse (312122201), we get a palindrome (414343414).

The spelling of 102221213 in words is "one hundred two million, two hundred twenty-one thousand, two hundred thirteen".