1200000221 has 8 divisors (see below), whose sum is σ = 1375251840. Its totient is φ = 1025704368.

The previous prime is 1200000203. The next prime is 1200000227. The reversal of 1200000221 is 1220000021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200000221 - 2¹⁰ = 1199999197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200000199 and 1200000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200000227) 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, 236246 + ... + 241271.

It is an arithmetic number, because the mean of its divisors is an integer number (171906480).

Almost surely, 2^1200000221 is an apocalyptic number.

It is an amenable number.

1200000221 is a deficient number, since it is larger than the sum of its proper divisors (175251619).

1200000221 is an equidigital number, since it uses as much as digits as its factorization.

1200000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477883.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1200000221 is about 34641.0193412376. The cubic root of 1200000221 is about 1062.6586344180.

Adding to 1200000221 its reverse (1220000021), we get a palindrome (2420000242).

The spelling of 1200000221 in words is "one billion, two hundred million, two hundred twenty-one", and thus it is an aban number.