33220123213 has 4 divisors (see below), whose sum is σ = 33675193468. Its totient is φ = 32765052960.

The previous prime is 33220123207. The next prime is 33220123217. The reversal of 33220123213 is 31232102233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31232102233 = 89 ⋅350922497.

It can be written as a sum of positive squares in 2 ways, for example, as 8457009444 + 24763113769 = 91962^2 + 157363^2 .

It is a cyclic number.

It is not a de Polignac number, because 33220123213 - 2⁹ = 33220122701 is a prime.

It is a super-2 number, since 2×33220123213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220123217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227535018 + ... + 227535163.

It is an arithmetic number, because the mean of its divisors is an integer number (8418798367).

Almost surely, 2^33220123213 is an apocalyptic number.

It is an amenable number.

33220123213 is a deficient number, since it is larger than the sum of its proper divisors (455070255).

33220123213 is an equidigital number, since it uses as much as digits as its factorization.

33220123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455070254.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33220123213 its reverse (31232102233), we get a palindrome (64452225446).

The spelling of 33220123213 in words is "thirty-three billion, two hundred twenty million, one hundred twenty-three thousand, two hundred thirteen".