5122121 has 2 divisors, whose sum is σ = 5122122. Its totient is φ = 5122120.

The previous prime is 5122111. The next prime is 5122127. The reversal of 5122121 is 1212215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5112121 + 10000 = 2261^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5122121 is a prime.

It is a super-2 number, since 2×5122121² = 52472247077282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5122096 and 5122105.

It is not a weakly prime, because it can be changed into another prime (5122127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2561060 + 2561061.

It is an arithmetic number, because the mean of its divisors is an integer number (2561061).

Almost surely, 2^5122121 is an apocalyptic number.

It is an amenable number.

5122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5122121 is an equidigital number, since it uses as much as digits as its factorization.

5122121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40, while the sum is 14.

The square root of 5122121 is about 2263.2103304819. The cubic root of 5122121 is about 172.3785716876.

Adding to 5122121 its reverse (1212215), we get a palindrome (6334336).

The spelling of 5122121 in words is "five million, one hundred twenty-two thousand, one hundred twenty-one".