222002421 has 8 divisors (see below), whose sum is σ = 302887200. Its totient is φ = 144559632.

The previous prime is 222002393. The next prime is 222002461. The reversal of 222002421 is 124200222.

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

It is not a de Polignac number, because 222002421 - 2⁶ = 222002357 is a prime.

It is a super-2 number, since 2×222002421² = 98570149859722482, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222002421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860346 + ... + 860603.

It is an arithmetic number, because the mean of its divisors is an integer number (37860900).

Almost surely, 2^222002421 is an apocalyptic number.

It is an amenable number.

222002421 is a deficient number, since it is larger than the sum of its proper divisors (80884779).

222002421 is a wasteful number, since it uses less digits than its factorization.

222002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720995.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 222002421 is about 14899.7456689703. The cubic root of 222002421 is about 605.5070957352.

Adding to 222002421 its reverse (124200222), we get a palindrome (346202643).

The spelling of 222002421 in words is "two hundred twenty-two million, two thousand, four hundred twenty-one".