222116421 has 8 divisors (see below), whose sum is σ = 296291104. Its totient is φ = 148009680.

The previous prime is 222116399. The next prime is 222116429. The reversal of 222116421 is 124611222.

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

It is not a de Polignac number, because 222116421 - 2¹⁴ = 222100037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222116429) 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, 8791 + ... + 22836.

It is an arithmetic number, because the mean of its divisors is an integer number (37036388).

Almost surely, 2^222116421 is an apocalyptic number.

It is an amenable number.

222116421 is a deficient number, since it is larger than the sum of its proper divisors (74174683).

222116421 is a wasteful number, since it uses less digits than its factorization.

222116421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33971.

The product of its digits is 384, while the sum is 21.

The square root of 222116421 is about 14903.5707466365. The cubic root of 222116421 is about 605.6107222280.

Adding to 222116421 its reverse (124611222), we get a palindrome (346727643).

The spelling of 222116421 in words is "two hundred twenty-two million, one hundred sixteen thousand, four hundred twenty-one".