221222009996 has 24 divisors (see below), whose sum is σ = 438861479280. Its totient is φ = 96728651712.

The previous prime is 221222009909. The next prime is 221222010059. The reversal of 221222009996 is 699900222122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111953471 + ... + 111955446.

It is an arithmetic number, because the mean of its divisors is an integer number (18285894970).

Almost surely, 2^221222009996 is an apocalyptic number.

221222009996 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221222009996 is a deficient number, since it is larger than the sum of its proper divisors (217639469284).

221222009996 is a wasteful number, since it uses less digits than its factorization.

221222009996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223908953 (or 223908951 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 221222009996 in words is "two hundred twenty-one billion, two hundred twenty-two million, nine thousand, nine hundred ninety-six".