123220030121 has 2 divisors, whose sum is σ = 123220030122. Its totient is φ = 123220030120.

The previous prime is 123220030093. The next prime is 123220030151. The reversal of 123220030121 is 121030022321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88759305625 + 34460724496 = 297925^2 + 185636^2 .

It is a cyclic number.

It is not a de Polignac number, because 123220030121 - 2¹⁴ = 123220013737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123220030121.

It is not a weakly prime, because it can be changed into another prime (123220030151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61610015060 + 61610015061.

It is an arithmetic number, because the mean of its divisors is an integer number (61610015061).

Almost surely, 2^123220030121 is an apocalyptic number.

It is an amenable number.

123220030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123220030121 is an equidigital number, since it uses as much as digits as its factorization.

123220030121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123220030121 its reverse (121030022321), we get a palindrome (244250052442).

The spelling of 123220030121 in words is "one hundred twenty-three billion, two hundred twenty million, thirty thousand, one hundred twenty-one".