102030121 has 2 divisors, whose sum is σ = 102030122. Its totient is φ = 102030120.

The previous prime is 102030119. The next prime is 102030143. The reversal of 102030121 is 121030201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99780121 + 2250000 = 9989^2 + 1500^2 .

It is a cyclic number.

It is not a de Polignac number, because 102030121 - 2¹ = 102030119 is a prime.

Together with 102030119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 102030098 and 102030107.

It is not a weakly prime, because it can be changed into another prime (102030161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51015060 + 51015061.

It is an arithmetic number, because the mean of its divisors is an integer number (51015061).

Almost surely, 2^102030121 is an apocalyptic number.

It is an amenable number.

102030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102030121 is an equidigital number, since it uses as much as digits as its factorization.

102030121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 102030121 is about 10100.9960399953. The cubic root of 102030121 is about 467.2788602090.

Adding to 102030121 its reverse (121030201), we get a palindrome (223060322).

The spelling of 102030121 in words is "one hundred two million, thirty thousand, one hundred twenty-one".