222202323421 has 4 divisors (see below), whose sum is σ = 239294809852. Its totient is φ = 205109836992.

The previous prime is 222202323401. The next prime is 222202323439. The reversal of 222202323421 is 124323202222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68429328100 + 153772995321 = 261590^2 + 392139^2 .

It is a cyclic number.

It is not a de Polignac number, because 222202323421 - 2⁷ = 222202323293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222202323401) 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, 8546243196 + ... + 8546243221.

It is an arithmetic number, because the mean of its divisors is an integer number (59823702463).

Almost surely, 2^222202323421 is an apocalyptic number.

It is an amenable number.

222202323421 is a deficient number, since it is larger than the sum of its proper divisors (17092486431).

222202323421 is a wasteful number, since it uses less digits than its factorization.

222202323421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17092486430.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 222202323421 its reverse (124323202222), we get a palindrome (346525525643).

The spelling of 222202323421 in words is "two hundred twenty-two billion, two hundred two million, three hundred twenty-three thousand, four hundred twenty-one".