6222121 has 4 divisors (see below), whose sum is σ = 6492672. Its totient is φ = 5951572.

The previous prime is 6222113. The next prime is 6222149. The reversal of 6222121 is 1212226.

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 an emirpimes, since its reverse is a distinct semiprime: 1212226 = 2 ⋅606113.

It is not a de Polignac number, because 6222121 - 2³ = 6222113 is a prime.

It is a Duffinian number.

6222121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6222095 and 6222104.

It is not an unprimeable number, because it can be changed into a prime (6222191) 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 in 3 ways as a sum of consecutive naturals, for example, 135241 + ... + 135286.

It is an arithmetic number, because the mean of its divisors is an integer number (1623168).

Almost surely, 2^6222121 is an apocalyptic number.

It is an amenable number.

6222121 is a deficient number, since it is larger than the sum of its proper divisors (270551).

6222121 is a wasteful number, since it uses less digits than its factorization.

6222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270550.

The product of its digits is 96, while the sum is 16.

The square root of 6222121 is about 2494.4179681842. The cubic root of 6222121 is about 183.9272810470.

Adding to 6222121 its reverse (1212226), we get a palindrome (7434347).

The spelling of 6222121 in words is "six million, two hundred twenty-two thousand, one hundred twenty-one".