12211021033 has 4 divisors (see below), whose sum is σ = 12214264660. Its totient is φ = 12207777408.

The previous prime is 12211020971. The next prime is 12211021037. The reversal of 12211021033 is 33012011221.

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 7862014224 + 4349006809 = 88668^2 + 65947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211021033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211020998 and 12211021016.

It is not an unprimeable number, because it can be changed into a prime (12211021037) 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, 1616160 + ... + 1623697.

It is an arithmetic number, because the mean of its divisors is an integer number (3053566165).

Almost surely, 2^12211021033 is an apocalyptic number.

It is an amenable number.

12211021033 is a deficient number, since it is larger than the sum of its proper divisors (3243627).

12211021033 is an equidigital number, since it uses as much as digits as its factorization.

12211021033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243626.

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

Adding to 12211021033 its reverse (33012011221), we get a palindrome (45223032254).

The spelling of 12211021033 in words is "twelve billion, two hundred eleven million, twenty-one thousand, thirty-three".