1221332113333 has 4 divisors (see below), whose sum is σ = 1221366482028. Its totient is φ = 1221297744640.

The previous prime is 1221332113327. The next prime is 1221332113343. The reversal of 1221332113333 is 3333112331221.

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 561335103729 + 659997009604 = 749223^2 + 812402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221332113333 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 (1221332113343) 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, 17130988 + ... + 17202133.

It is an arithmetic number, because the mean of its divisors is an integer number (305341620507).

Almost surely, 2^{1221332113333} is an apocalyptic number.

It is an amenable number.

1221332113333 is a deficient number, since it is larger than the sum of its proper divisors (34368695).

1221332113333 is an equidigital number, since it uses as much as digits as its factorization.

1221332113333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34368694.

The product of its digits is 5832, while the sum is 28.

Adding to 1221332113333 its reverse (3333112331221), we get a palindrome (4554444444554).

The spelling of 1221332113333 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, one hundred thirteen thousand, three hundred thirty-three".