6221657121 has 8 divisors (see below), whose sum is σ = 8452062720. Its totient is φ = 4069511472.

The previous prime is 6221657089. The next prime is 6221657131. The reversal of 6221657121 is 1217561226.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6221657121 - 2⁵ = 6221657089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6221657131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19564801 + ... + 19565118.

It is an arithmetic number, because the mean of its divisors is an integer number (1056507840).

Almost surely, 2^6221657121 is an apocalyptic number.

It is an amenable number.

6221657121 is a deficient number, since it is larger than the sum of its proper divisors (2230405599).

6221657121 is a wasteful number, since it uses less digits than its factorization.

6221657121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39129975.

The product of its digits is 10080, while the sum is 33.

The square root of 6221657121 is about 78877.4817105617. The cubic root of 6221657121 is about 1839.2271014461.

The spelling of 6221657121 in words is "six billion, two hundred twenty-one million, six hundred fifty-seven thousand, one hundred twenty-one".