21222211202 has 8 divisors (see below), whose sum is σ = 31835292300. Its totient is φ = 10610447104.

The previous prime is 21222211183. The next prime is 21222211211. The reversal of 21222211202 is 20211222212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17253085201 + 3969126001 = 131351^2 + 63001^2 .

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, 287927 + ... + 354042.

Almost surely, 2^21222211202 is an apocalyptic number.

21222211202 is a deficient number, since it is larger than the sum of its proper divisors (10613081098).

21222211202 is a wasteful number, since it uses less digits than its factorization.

21222211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658500.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222211202 its reverse (20211222212), we get a palindrome (41433433414).

The spelling of 21222211202 in words is "twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred two".