130121 has 2 divisors, whose sum is σ = 130122. Its totient is φ = 130120.

The previous prime is 130099. The next prime is 130127. The reversal of 130121 is 121031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126025 + 4096 = 355^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 130121 - 2⁶ = 130057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130099 and 130108.

It is not a weakly prime, because it can be changed into another prime (130127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65060 + 65061.

It is an arithmetic number, because the mean of its divisors is an integer number (65061).

2¹³⁰¹²¹ is an apocalyptic number.

It is an amenable number.

130121 is a deficient number, since it is larger than the sum of its proper divisors (1).

130121 is an equidigital number, since it uses as much as digits as its factorization.

130121 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 130121 is about 360.7228853289. The cubic root of 130121 is about 50.6736822772.

Adding to 130121 its reverse (121031), we get a palindrome (251152).

The spelling of 130121 in words is "one hundred thirty thousand, one hundred twenty-one".