33120232013 has 4 divisors (see below), whose sum is σ = 36131162208. Its totient is φ = 30109301820.

The previous prime is 33120231973. The next prime is 33120232051. The reversal of 33120232013 is 31023202133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33120232013 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 (33120232513) 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, 1505465081 + ... + 1505465102.

It is an arithmetic number, because the mean of its divisors is an integer number (9032790552).

Almost surely, 2^33120232013 is an apocalyptic number.

It is an amenable number.

33120232013 is a deficient number, since it is larger than the sum of its proper divisors (3010930195).

33120232013 is a wasteful number, since it uses less digits than its factorization.

33120232013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010930194.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 33120232013 its reverse (31023202133), we get a palindrome (64143434146).

The spelling of 33120232013 in words is "thirty-three billion, one hundred twenty million, two hundred thirty-two thousand, thirteen".