1331200221 has 8 divisors (see below), whose sum is σ = 1911467040. Its totient is φ = 819200112.

The previous prime is 1331200217. The next prime is 1331200237. The reversal of 1331200221 is 1220021331.

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

It is not a de Polignac number, because 1331200221 - 2² = 1331200217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331200261) 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, 17066631 + ... + 17066708.

It is an arithmetic number, because the mean of its divisors is an integer number (238933380).

Almost surely, 2^1331200221 is an apocalyptic number.

It is an amenable number.

1331200221 is a deficient number, since it is larger than the sum of its proper divisors (580266819).

1331200221 is a wasteful number, since it uses less digits than its factorization.

1331200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34133355.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1331200221 is about 36485.6166317633. The cubic root of 1331200221 is about 1100.0551545348.

Adding to 1331200221 its reverse (1220021331), we get a palindrome (2551221552).

The spelling of 1331200221 in words is "one billion, three hundred thirty-one million, two hundred thousand, two hundred twenty-one".