100030121 has 2 divisors, whose sum is σ = 100030122. Its totient is φ = 100030120.

The previous prime is 100030109. The next prime is 100030123. The reversal of 100030121 is 121030001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99780121 + 250000 = 9989^2 + 500^2 .

It is an emirp because it is prime and its reverse (121030001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100030121 is a prime.

Together with 100030123, 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 = 100030099 and 100030108.

It is not a weakly prime, because it can be changed into another prime (100030123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50015060 + 50015061.

It is an arithmetic number, because the mean of its divisors is an integer number (50015061).

Almost surely, 2^100030121 is an apocalyptic number.

It is an amenable number.

100030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

100030121 is an equidigital number, since it uses as much as digits as its factorization.

100030121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 100030121 is about 10001.5059366077. The cubic root of 100030121 is about 464.2054817820.

Adding to 100030121 its reverse (121030001), we get a palindrome (221060122).

The spelling of 100030121 in words is "one hundred million, thirty thousand, one hundred twenty-one".