103102213121221 has 2 divisors, whose sum is σ = 103102213121222. Its totient is φ = 103102213121220.

The previous prime is 103102213121207. The next prime is 103102213121267. The reversal of 103102213121221 is 122121312201301.

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., 82333138685121 + 20769074436100 = 9073761^2 + 4557310^2 .

It is a cyclic number.

It is not a de Polignac number, because 103102213121221 - 2⁷ = 103102213121093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103102213121192 and 103102213121201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103102213121321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51551106560610 + 51551106560611.

It is an arithmetic number, because the mean of its divisors is an integer number (51551106560611).

Almost surely, 2^{103102213121221} is an apocalyptic number.

It is an amenable number.

103102213121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

103102213121221 is an equidigital number, since it uses as much as digits as its factorization.

103102213121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 103102213121221 its reverse (122121312201301), we get a palindrome (225223525322522).

The spelling of 103102213121221 in words is "one hundred three trillion, one hundred two billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred twenty-one".