1221121320033 has 8 divisors (see below), whose sum is σ = 1628391787200. Its totient is φ = 813965866448.

The previous prime is 1221121319987. The next prime is 1221121320037. The reversal of 1221121320033 is 3300231211221.

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 1221121320033 - 2¹⁰ = 1221121319009 is a prime.

It is a super-2 number, since 2×1221121320033² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221121319991 and 1221121320009.

It is not an unprimeable number, because it can be changed into a prime (1221121320037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28728618 + ... + 28771091.

It is an arithmetic number, because the mean of its divisors is an integer number (203548973400).

Almost surely, 2^{1221121320033} is an apocalyptic number.

It is an amenable number.

1221121320033 is a deficient number, since it is larger than the sum of its proper divisors (407270467167).

1221121320033 is an equidigital number, since it uses as much as digits as its factorization.

1221121320033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57506791.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221121320033 its reverse (3300231211221), we get a palindrome (4521352531254).

The spelling of 1221121320033 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred twenty thousand, thirty-three".