21222220202 has 8 divisors (see below), whose sum is σ = 33508768800. Its totient is φ = 10052630604.

The previous prime is 21222220199. The next prime is 21222220223. The reversal of 21222220202 is 20202222212.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279239702 + ... + 279239777.

It is an arithmetic number, because the mean of its divisors is an integer number (4188596100).

Almost surely, 2^21222220202 is an apocalyptic number.

21222220202 is a deficient number, since it is larger than the sum of its proper divisors (12286548598).

21222220202 is a wasteful number, since it uses less digits than its factorization.

21222220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558479500.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21222220202 its reverse (20202222212), we get a palindrome (41424442414).

The spelling of 21222220202 in words is "twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred two".