10206121 has 2 divisors, whose sum is σ = 10206122. Its totient is φ = 10206120.

The previous prime is 10206107. The next prime is 10206149. The reversal of 10206121 is 12160201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 3956121 = 2500^2 + 1989^2 .

It is an emirp because it is prime and its reverse (12160201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10206121 - 2⁹ = 10205609 is a prime.

It is not a weakly prime, because it can be changed into another prime (10206821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103060 + 5103061.

It is an arithmetic number, because the mean of its divisors is an integer number (5103061).

Almost surely, 2^10206121 is an apocalyptic number.

It is an amenable number.

10206121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10206121 is an equidigital number, since it uses as much as digits as its factorization.

10206121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 10206121 is about 3194.7020205334. The cubic root of 10206121 is about 216.9136609952.

Adding to 10206121 its reverse (12160201), we get a palindrome (22366322).

The spelling of 10206121 in words is "ten million, two hundred six thousand, one hundred twenty-one".