33231213213 has 32 divisors (see below), whose sum is σ = 48996347904. Its totient is φ = 19866600000.

The previous prime is 33231213181. The next prime is 33231213217. The reversal of 33231213213 is 31231213233.

It is not a de Polignac number, because 33231213213 - 2⁵ = 33231213181 is a prime.

It is a super-2 number, since 2×33231213213² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33231213217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 884848 + ... + 921638.

It is an arithmetic number, because the mean of its divisors is an integer number (1531135872).

Almost surely, 2^33231213213 is an apocalyptic number.

33231213213 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

33231213213 is a deficient number, since it is larger than the sum of its proper divisors (15765134691).

33231213213 is a wasteful number, since it uses less digits than its factorization.

33231213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37177.

The product of its digits is 1944, while the sum is 24.

Adding to 33231213213 its reverse (31231213233), we get a palindrome (64462426446).

The spelling of 33231213213 in words is "thirty-three billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred thirteen".