222021001 has 8 divisors (see below), whose sum is σ = 232185600. Its totient is φ = 211899072.

The previous prime is 222020999. The next prime is 222021011. The reversal of 222021001 is 100120222.

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

It is a cyclic number.

It is not a de Polignac number, because 222021001 - 2¹ = 222020999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222021011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225 + ... + 21073.

It is an arithmetic number, because the mean of its divisors is an integer number (29023200).

Almost surely, 2^222021001 is an apocalyptic number.

It is an amenable number.

222021001 is a deficient number, since it is larger than the sum of its proper divisors (10164599).

222021001 is a wasteful number, since it uses less digits than its factorization.

222021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21335.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 222021001 is about 14900.3691565008. The cubic root of 222021001 is about 605.5239874549.

Adding to 222021001 its reverse (100120222), we get a palindrome (322141223).

The spelling of 222021001 in words is "two hundred twenty-two million, twenty-one thousand, one".