21220222209 has 8 divisors (see below), whose sum is σ = 28294669920. Its totient is φ = 14146294656.

The previous prime is 21220222193. The next prime is 21220222241. The reversal of 21220222209 is 90222202212.

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

It is not a de Polignac number, because 21220222209 - 2⁴ = 21220222193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220242209) 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, 22032 + ... + 207185.

It is an arithmetic number, because the mean of its divisors is an integer number (3536833740).

Almost surely, 2^21220222209 is an apocalyptic number.

It is an amenable number.

21220222209 is a deficient number, since it is larger than the sum of its proper divisors (7074447711).

21220222209 is a wasteful number, since it uses less digits than its factorization.

21220222209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260079.

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 21220222209 in words is "twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred nine".