1221101132033 has 4 divisors (see below), whose sum is σ = 1221540854340. Its totient is φ = 1220661409728.

The previous prime is 1221101132029. The next prime is 1221101132051. The reversal of 1221101132033 is 3302311011221.

It is a happy number.

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 543009819664 + 678091312369 = 736892^2 + 823463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221101132033 - 2² = 1221101132029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221101131996 and 1221101132014.

It is not an unprimeable number, because it can be changed into a prime (1221101132833) 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 3 ways as a sum of consecutive naturals, for example, 219856988 + ... + 219862541.

It is an arithmetic number, because the mean of its divisors is an integer number (305385213585).

Almost surely, 2^{1221101132033} is an apocalyptic number.

It is an amenable number.

1221101132033 is a deficient number, since it is larger than the sum of its proper divisors (439722307).

1221101132033 is an equidigital number, since it uses as much as digits as its factorization.

1221101132033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439722306.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1221101132033 its reverse (3302311011221), we get a palindrome (4523412143254).

The spelling of 1221101132033 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred thirty-two thousand, thirty-three".