12021001133 has 4 divisors (see below), whose sum is σ = 12127381788. Its totient is φ = 11914620480.

The previous prime is 12021001127. The next prime is 12021001141. The reversal of 12021001133 is 33110012021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33110012021 = 32833 ⋅1008437.

It can be written as a sum of positive squares in 2 ways, for example, as 309865609 + 11711135524 = 17603^2 + 108218^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021001133 - 2⁴ = 12021001117 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 (12021001163) 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, 53190158 + ... + 53190383.

It is an arithmetic number, because the mean of its divisors is an integer number (3031845447).

Almost surely, 2^12021001133 is an apocalyptic number.

It is an amenable number.

12021001133 is a deficient number, since it is larger than the sum of its proper divisors (106380655).

12021001133 is a wasteful number, since it uses less digits than its factorization.

12021001133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106380654.

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

Adding to 12021001133 its reverse (33110012021), we get a palindrome (45131013154).

The spelling of 12021001133 in words is "twelve billion, twenty-one million, one thousand, one hundred thirty-three".