103231202121221 has 2 divisors, whose sum is σ = 103231202121222. Its totient is φ = 103231202121220.

The previous prime is 103231202121133. The next prime is 103231202121241. The reversal of 103231202121221 is 122121202132301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62766972798721 + 40464229322500 = 7922561^2 + 6361150^2 .

It is a cyclic number.

It is not a de Polignac number, because 103231202121221 - 2¹⁰ = 103231202120197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103231202121241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51615601060610 + 51615601060611.

It is an arithmetic number, because the mean of its divisors is an integer number (51615601060611).

Almost surely, 2^{103231202121221} is an apocalyptic number.

It is an amenable number.

103231202121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

103231202121221 is an equidigital number, since it uses as much as digits as its factorization.

103231202121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 103231202121221 its reverse (122121202132301), we get a palindrome (225352404253522).

The spelling of 103231202121221 in words is "one hundred three trillion, two hundred thirty-one billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-one".