21202222108 has 12 divisors (see below), whose sum is σ = 37370824120. Its totient is φ = 10524843792.

The previous prime is 21202222099. The next prime is 21202222109. The reversal of 21202222108 is 80122220212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202222109) by changing a digit.

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, 19066191 + ... + 19067302.

Almost surely, 2^21202222108 is an apocalyptic number.

It is an amenable number.

21202222108 is a deficient number, since it is larger than the sum of its proper divisors (16168602012).

21202222108 is a wasteful number, since it uses less digits than its factorization.

21202222108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38133636 (or 38133634 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The spelling of 21202222108 in words is "twenty-one billion, two hundred two million, two hundred twenty-two thousand, one hundred eight".