5212121 has 4 divisors (see below), whose sum is σ = 5217744. Its totient is φ = 5206500.

The previous prime is 5212111. The next prime is 5212133. The reversal of 5212121 is 1212125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5212121 - 2⁶ = 5212057 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 5212096 and 5212105.

It is not an unprimeable number, because it can be changed into a prime (5212111) 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, 1055 + ... + 3396.

It is an arithmetic number, because the mean of its divisors is an integer number (1304436).

Almost surely, 2^5212121 is an apocalyptic number.

It is an amenable number.

5212121 is a deficient number, since it is larger than the sum of its proper divisors (5623).

5212121 is a wasteful number, since it uses less digits than its factorization.

5212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622.

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

The square root of 5212121 is about 2283.0070083116. The cubic root of 5212121 is about 173.3823279480.

Adding to 5212121 its reverse (1212125), we get a palindrome (6424246).

The spelling of 5212121 in words is "five million, two hundred twelve thousand, one hundred twenty-one".