100500121 has 2 divisors, whose sum is σ = 100500122. Its totient is φ = 100500120.

The previous prime is 100500019. The next prime is 100500131. The reversal of 100500121 is 121005001.

It is a happy number.

It is an a-pointer prime, because the next prime (100500131) can be obtained adding 100500121 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91470096 + 9030025 = 9564^2 + 3005^2 .

It is a cyclic number.

It is not a de Polignac number, because 100500121 - 2¹⁹ = 99975833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100500098 and 100500107.

It is not a weakly prime, because it can be changed into another prime (100500131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50250060 + 50250061.

It is an arithmetic number, because the mean of its divisors is an integer number (50250061).

Almost surely, 2^100500121 is an apocalyptic number.

It is an amenable number.

100500121 is a deficient number, since it is larger than the sum of its proper divisors (1).

100500121 is an equidigital number, since it uses as much as digits as its factorization.

100500121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 100500121 is about 10024.9748628114. The cubic root of 100500121 is about 464.9313823288.

Adding to 100500121 its reverse (121005001), we get a palindrome (221505122).

The spelling of 100500121 in words is "one hundred million, five hundred thousand, one hundred twenty-one".