1320221111 has 8 divisors (see below), whose sum is σ = 1464652800. Its totient is φ = 1179858040.

The previous prime is 1320221083. The next prime is 1320221129. The reversal of 1320221111 is 1111220231.

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

It is a cyclic number.

It is not a de Polignac number, because 1320221111 - 2⁶ = 1320221047 is a prime.

It is a super-4 number, since 4×1320221111⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320221141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016471 + ... + 1017768.

It is an arithmetic number, because the mean of its divisors is an integer number (183081600).

Almost surely, 2^1320221111 is an apocalyptic number.

1320221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320221111 is a deficient number, since it is larger than the sum of its proper divisors (144431689).

1320221111 is a wasteful number, since it uses less digits than its factorization.

1320221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034309.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1320221111 is about 36334.8470617395. The cubic root of 1320221111 is about 1097.0225571205.

Adding to 1320221111 its reverse (1111220231), we get a palindrome (2431441342).

The spelling of 1320221111 in words is "one billion, three hundred twenty million, two hundred twenty-one thousand, one hundred eleven".