221212202 has 8 divisors (see below), whose sum is σ = 331922496. Its totient is φ = 110571372.

The previous prime is 221212141. The next prime is 221212207. The reversal of 221212202 is 202212122.

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 (221212207) 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, 8498 + ... + 22685.

It is an arithmetic number, because the mean of its divisors is an integer number (41490312).

Almost surely, 2^221212202 is an apocalyptic number.

221212202 is a deficient number, since it is larger than the sum of its proper divisors (110710294).

221212202 is a wasteful number, since it uses less digits than its factorization.

221212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34732.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221212202 is about 14873.2041605029. The cubic root of 221212202 is about 604.7878061945.

Adding to 221212202 its reverse (202212122), we get a palindrome (423424324).

The spelling of 221212202 in words is "two hundred twenty-one million, two hundred twelve thousand, two hundred two".