1200000000221 has 8 divisors (see below), whose sum is σ = 1322052206688. Its totient is φ = 1080108010000.

The previous prime is 1200000000203. The next prime is 1200000000239. The reversal of 1200000000221 is 1220000000021.

It is an interprime number because it is at equal distance from previous prime (1200000000203) and next prime (1200000000239).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200000000221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200000000199 and 1200000000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200000000281) 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, 540052895 + ... + 540055116.

It is an arithmetic number, because the mean of its divisors is an integer number (165256525836).

Almost surely, 2^{1200000000221} is an apocalyptic number.

1200000000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200000000221 is a deficient number, since it is larger than the sum of its proper divisors (122052206467).

1200000000221 is a wasteful number, since it uses less digits than its factorization.

1200000000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080108123.

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

Adding to 1200000000221 its reverse (1220000000021), we get a palindrome (2420000000242).

The spelling of 1200000000221 in words is "one trillion, two hundred billion, two hundred twenty-one", and thus it is an aban number.