104001220121 has 2 divisors, whose sum is σ = 104001220122. Its totient is φ = 104001220120.

The previous prime is 104001220097. The next prime is 104001220123. The reversal of 104001220121 is 121022100401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53740512400 + 50260707721 = 231820^2 + 224189^2 .

It is an emirp because it is prime and its reverse (121022100401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104001220121 - 2¹⁴ = 104001203737 is a prime.

Together with 104001220123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 104001220096 and 104001220105.

It is not a weakly prime, because it can be changed into another prime (104001220123) 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, 52000610060 + 52000610061.

It is an arithmetic number, because the mean of its divisors is an integer number (52000610061).

Almost surely, 2^104001220121 is an apocalyptic number.

It is an amenable number.

104001220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

104001220121 is an equidigital number, since it uses as much as digits as its factorization.

104001220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 104001220121 its reverse (121022100401), we get a palindrome (225023320522).

The spelling of 104001220121 in words is "one hundred four billion, one million, two hundred twenty thousand, one hundred twenty-one".