12001021133 has 8 divisors (see below), whose sum is σ = 12289534488. Its totient is φ = 11714807104.

The previous prime is 12001021127. The next prime is 12001021147. The reversal of 12001021133 is 33112010021.

It can be written as a sum of positive squares in 4 ways, for example, as 4621008484 + 7380012649 = 67978^2 + 85907^2 .

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 12001021133 - 2¹² = 12001017037 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 (12001021933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564266 + ... + 585147.

It is an arithmetic number, because the mean of its divisors is an integer number (1536191811).

Almost surely, 2^12001021133 is an apocalyptic number.

It is an amenable number.

12001021133 is a deficient number, since it is larger than the sum of its proper divisors (288513355).

12001021133 is a wasteful number, since it uses less digits than its factorization.

12001021133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149663.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12001021133 its reverse (33112010021), we get a palindrome (45113031154).

The spelling of 12001021133 in words is "twelve billion, one million, twenty-one thousand, one hundred thirty-three".