33123011213 has 4 divisors (see below), whose sum is σ = 33123481020. Its totient is φ = 33122541408.

The previous prime is 33123011177. The next prime is 33123011227. The reversal of 33123011213 is 31211032133.

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 19444071364 + 13678939849 = 139442^2 + 116957^2 .

It is a cyclic number.

It is not a de Polignac number, because 33123011213 - 2²⁰ = 33121962637 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 (33123019213) 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, 105320 + ... + 278097.

It is an arithmetic number, because the mean of its divisors is an integer number (8280870255).

Almost surely, 2^33123011213 is an apocalyptic number.

It is an amenable number.

33123011213 is a deficient number, since it is larger than the sum of its proper divisors (469807).

33123011213 is an equidigital number, since it uses as much as digits as its factorization.

33123011213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469806.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 33123011213 its reverse (31211032133), we get a palindrome (64334043346).

The spelling of 33123011213 in words is "thirty-three billion, one hundred twenty-three million, eleven thousand, two hundred thirteen".