1200322221 has 8 divisors (see below), whose sum is σ = 1829062464. Its totient is φ = 685898400.

The previous prime is 1200322187. The next prime is 1200322223. The reversal of 1200322221 is 1222230021.

It is a happy number.

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

It is not a de Polignac number, because 1200322221 - 2⁹ = 1200321709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200322221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200322223) 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, 28579080 + ... + 28579121.

It is an arithmetic number, because the mean of its divisors is an integer number (228632808).

Almost surely, 2^1200322221 is an apocalyptic number.

It is an amenable number.

1200322221 is a deficient number, since it is larger than the sum of its proper divisors (628740243).

1200322221 is an equidigital number, since it uses as much as digits as its factorization.

1200322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57158211.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1200322221 is about 34645.6666987374. Note that the first 4 decimals coincide. The cubic root of 1200322221 is about 1062.7536748114.

Adding to 1200322221 its reverse (1222230021), we get a palindrome (2422552242).

The spelling of 1200322221 in words is "one billion, two hundred million, three hundred twenty-two thousand, two hundred twenty-one".