10020121 has 2 divisors, whose sum is σ = 10020122.
Its totient is φ = 10020120.
The previous prime is 10020107. The next prime is 10020133. The reversal of 10020121 is 12102001.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9388096 + 632025 = 3064^2 + 795^2
It is an emirp because it is prime and its reverse (12102001) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 10020121 - 29 = 10019609 is a prime.
It is not a weakly prime, because it can be changed into another prime (10020151) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010060 + 5010061.
It is an arithmetic number, because the mean of its divisors is an integer number (5010061).
Almost surely, 210020121 is an apocalyptic number.
It is an amenable number.
10020121 is a deficient number, since it is larger than the sum of its proper divisors (1).
10020121 is an equidigital number, since it uses as much as digits as its factorization.
10020121 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 4, while the sum is 7.
The square root of 10020121 is about 3165.4574708879.
The cubic root of 10020121 is about 215.5878701313.
Adding to 10020121 its reverse (12102001), we get a palindrome (22122122).
The spelling of 10020121 in words is "ten million, twenty thousand, one hundred twenty-one".