1320112332221 has 4 divisors (see below), whose sum is σ = 1320237912252. Its totient is φ = 1319986752192.

The previous prime is 1320112332193. The next prime is 1320112332223. The reversal of 1320112332221 is 1222332110231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8801066596 + 1311311265625 = 93814^2 + 1145125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320112332221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320112332223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62774246 + ... + 62795271.

It is an arithmetic number, because the mean of its divisors is an integer number (330059478063).

Almost surely, 2^{1320112332221} is an apocalyptic number.

It is an amenable number.

1320112332221 is a deficient number, since it is larger than the sum of its proper divisors (125580031).

1320112332221 is a wasteful number, since it uses less digits than its factorization.

1320112332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125580030.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1320112332221 its reverse (1222332110231), we get a palindrome (2542444442452).

The spelling of 1320112332221 in words is "one trillion, three hundred twenty billion, one hundred twelve million, three hundred thirty-two thousand, two hundred twenty-one".