5121121 has 4 divisors (see below), whose sum is σ = 5130244. Its totient is φ = 5112000.

The previous prime is 5121119. The next prime is 5121143. The reversal of 5121121 is 1211215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211215 = 5 ⋅242243.

It can be written as a sum of positive squares in 2 ways, for example, as 3459600 + 1661521 = 1860^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121121 - 2¹ = 5121119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5121161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3660 + ... + 4861.

It is an arithmetic number, because the mean of its divisors is an integer number (1282561).

Almost surely, 2^5121121 is an apocalyptic number.

It is an amenable number.

5121121 is a deficient number, since it is larger than the sum of its proper divisors (9123).

5121121 is an equidigital number, since it uses as much as digits as its factorization.

5121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9122.

The product of its digits is 20, while the sum is 13.

The square root of 5121121 is about 2262.9893945841. The cubic root of 5121121 is about 172.3673530413.

Adding to 5121121 its reverse (1211215), we get a palindrome (6332336).

The spelling of 5121121 in words is "five million, one hundred twenty-one thousand, one hundred twenty-one".