33123120013 has 4 divisors (see below), whose sum is σ = 33128369820. Its totient is φ = 33117870208.

The previous prime is 33123119989. The next prime is 33123120047. The reversal of 33123120013 is 31002132133.

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 19292654404 + 13830465609 = 138898^2 + 117603^2 .

It is a cyclic number.

It is not a de Polignac number, because 33123120013 - 2¹³ = 33123111821 is a prime.

It is a super-2 number, since 2×33123120013² (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 (33123120073) 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, 2615428 + ... + 2628061.

It is an arithmetic number, because the mean of its divisors is an integer number (8282092455).

Almost surely, 2^33123120013 is an apocalyptic number.

It is an amenable number.

33123120013 is a deficient number, since it is larger than the sum of its proper divisors (5249807).

33123120013 is an equidigital number, since it uses as much as digits as its factorization.

33123120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249806.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 33123120013 its reverse (31002132133), we get a palindrome (64125252146).

The spelling of 33123120013 in words is "thirty-three billion, one hundred twenty-three million, one hundred twenty thousand, thirteen".