221210002 has 16 divisors (see below), whose sum is σ = 362237400. Its totient is φ = 100697472.

The previous prime is 221209991. The next prime is 221210009. The reversal of 221210002 is 200012122.

It can be written as a sum of positive squares in 4 ways, for example, as 152004241 + 69205761 = 12329^2 + 8319^2 .

It is not an unprimeable number, because it can be changed into a prime (221210009) 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, 56377 + ... + 60172.

Almost surely, 2^221210002 is an apocalyptic number.

221210002 is a deficient number, since it is larger than the sum of its proper divisors (141027398).

221210002 is a wasteful number, since it uses less digits than its factorization.

221210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116637.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 221210002 is about 14873.1302018102. The cubic root of 221210002 is about 604.7858012755.

Adding to 221210002 its reverse (200012122), we get a palindrome (421222124).

The spelling of 221210002 in words is "two hundred twenty-one million, two hundred ten thousand, two".