221222002 has 8 divisors (see below), whose sum is σ = 333124956. Its totient is φ = 110180352.

The previous prime is 221221967. The next prime is 221222009. The reversal of 221222002 is 200222122.

It can be written as a sum of positive squares in 2 ways, for example, as 202464441 + 18757561 = 14229^2 + 4331^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221222009) 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, 214683 + ... + 215710.

Almost surely, 2^221222002 is an apocalyptic number.

221222002 is a deficient number, since it is larger than the sum of its proper divisors (111902954).

221222002 is a wasteful number, since it uses less digits than its factorization.

221222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430652.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 221222002 is about 14873.5336083931. The cubic root of 221222002 is about 604.7967370354.

Adding to 221222002 its reverse (200222122), we get a palindrome (421444124).

It can be divided in two parts, 22122 and 2002, that multiplied together give a palindrome (44288244).

The spelling of 221222002 in words is "two hundred twenty-one million, two hundred twenty-two thousand, two".