1100320001221 has 12 divisors (see below), whose sum is σ = 1281341923020. Its totient is φ = 942116179200.

The previous prime is 1100320001213. The next prime is 1100320001237. The reversal of 1100320001221 is 1221000230011.

It can be written as a sum of positive squares in 2 ways, for example, as 364953724996 + 735366276225 = 604114^2 + 857535^2 .

It is not a de Polignac number, because 1100320001221 - 2³ = 1100320001213 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 (1100320004221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12040330 + ... + 12131371.

It is an arithmetic number, because the mean of its divisors is an integer number (106778493585).

Almost surely, 2^{1100320001221} is an apocalyptic number.

It is an amenable number.

1100320001221 is a deficient number, since it is larger than the sum of its proper divisors (181021921799).

1100320001221 is an equidigital number, since it uses as much as digits as its factorization.

1100320001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24172644 (or 24172637 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1100320001221 its reverse (1221000230011), we get a palindrome (2321320231232).

The spelling of 1100320001221 in words is "one trillion, one hundred billion, three hundred twenty million, one thousand, two hundred twenty-one".