1200220221 has 8 divisors (see below), whose sum is σ = 1600454080. Its totient is φ = 800066592.

The previous prime is 1200220163. The next prime is 1200220223. The reversal of 1200220221 is 1220220021.

1200220221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1200220221 - 2⁶ = 1200220157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200220197 and 1200220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200220223) 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, 44985 + ... + 66513.

It is an arithmetic number, because the mean of its divisors is an integer number (200056760).

Almost surely, 2^1200220221 is an apocalyptic number.

It is an amenable number.

1200220221 is a deficient number, since it is larger than the sum of its proper divisors (400233859).

1200220221 is a wasteful number, since it uses less digits than its factorization.

1200220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40115.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1200220221 is about 34644.1946218988. The cubic root of 1200220221 is about 1062.7235706878.

Adding to 1200220221 its reverse (1220220021), we get a palindrome (2420440242).

It can be divided in two parts, 12002 and 20221, that added together give a palindrome (32223).

The spelling of 1200220221 in words is "one billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".