12021211033 has 4 divisors (see below), whose sum is σ = 12945919588. Its totient is φ = 11096502480.

The previous prime is 12021210983. The next prime is 12021211117. The reversal of 12021211033 is 33011212021.

12021211033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 726410304 + 11294800729 = 26952^2 + 106277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021211033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021210998 and 12021211016.

It is not an unprimeable number, because it can be changed into a prime (12021211133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462354258 + ... + 462354283.

It is an arithmetic number, because the mean of its divisors is an integer number (3236479897).

Almost surely, 2^12021211033 is an apocalyptic number.

12021211033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12021211033 is a deficient number, since it is larger than the sum of its proper divisors (924708555).

12021211033 is an equidigital number, since it uses as much as digits as its factorization.

12021211033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924708554.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12021211033 its reverse (33011212021), we get a palindrome (45032423054).

The spelling of 12021211033 in words is "twelve billion, twenty-one million, two hundred eleven thousand, thirty-three".