33120031213 has 4 divisors (see below), whose sum is σ = 33120411808. Its totient is φ = 33119650620.

The previous prime is 33120031171. The next prime is 33120031229. The reversal of 33120031213 is 31213002133.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 33120031213 - 2¹³ = 33120023021 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 (33120031283) 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, 11728 + ... + 257638.

It is an arithmetic number, because the mean of its divisors is an integer number (8280102952).

Almost surely, 2^33120031213 is an apocalyptic number.

It is an amenable number.

33120031213 is a deficient number, since it is larger than the sum of its proper divisors (380595).

33120031213 is a wasteful number, since it uses less digits than its factorization.

33120031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380594.

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

Adding to 33120031213 its reverse (31213002133), we get a palindrome (64333033346).

The spelling of 33120031213 in words is "thirty-three billion, one hundred twenty million, thirty-one thousand, two hundred thirteen".