222021321 has 8 divisors (see below), whose sum is σ = 296178624. Its totient is φ = 147939120.

The previous prime is 222021311. The next prime is 222021353. The reversal of 222021321 is 123120222.

It is a happy number.

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

It is not a de Polignac number, because 222021321 - 2⁷ = 222021193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222021321.

It is not an unprimeable number, because it can be changed into a prime (222021301) 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, 11470 + ... + 23991.

It is an arithmetic number, because the mean of its divisors is an integer number (37022328).

Almost surely, 2^222021321 is an apocalyptic number.

It is an amenable number.

222021321 is a deficient number, since it is larger than the sum of its proper divisors (74157303).

222021321 is a wasteful number, since it uses less digits than its factorization.

222021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37551.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 222021321 is about 14900.3798944859. The cubic root of 222021321 is about 605.5242783697.

Adding to 222021321 its reverse (123120222), we get a palindrome (345141543).

The spelling of 222021321 in words is "two hundred twenty-two million, twenty-one thousand, three hundred twenty-one".