1221013233233 has 8 divisors (see below), whose sum is σ = 1233339729960. Its totient is φ = 1208691388800.

The previous prime is 1221013233211. The next prime is 1221013233299. The reversal of 1221013233233 is 3323323101221.

It can be written as a sum of positive squares in 4 ways, for example, as 1159978542529 + 61034690704 = 1077023^2 + 247052^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221013233233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221013233203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634310 + ... + 1686527.

It is an arithmetic number, because the mean of its divisors is an integer number (154167466245).

Almost surely, 2^{1221013233233} is an apocalyptic number.

It is an amenable number.

1221013233233 is a deficient number, since it is larger than the sum of its proper divisors (12326496727).

1221013233233 is a wasteful number, since it uses less digits than its factorization.

1221013233233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326147.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1221013233233 its reverse (3323323101221), we get a palindrome (4544336334454).

The spelling of 1221013233233 in words is "one trillion, two hundred twenty-one billion, thirteen million, two hundred thirty-three thousand, two hundred thirty-three".