1320221211 has 32 divisors (see below), whose sum is σ = 1863057408. Its totient is φ = 830351520.

The previous prime is 1320221209. The next prime is 1320221233. The reversal of 1320221211 is 1121220231.

It is not a de Polignac number, because 1320221211 - 2¹ = 1320221209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320221291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1603746 + ... + 1604568.

It is an arithmetic number, because the mean of its divisors is an integer number (58220544).

Almost surely, 2^1320221211 is an apocalyptic number.

1320221211 is a deficient number, since it is larger than the sum of its proper divisors (542836197).

1320221211 is a wasteful number, since it uses less digits than its factorization.

1320221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1320221211 is about 36334.8484378289. The cubic root of 1320221211 is about 1097.0225848184.

Adding to 1320221211 its reverse (1121220231), we get a palindrome (2441441442).

The spelling of 1320221211 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, two hundred eleven".