213231211033 has 4 divisors (see below), whose sum is σ = 214508044800. Its totient is φ = 211954377268.

The previous prime is 213231211007. The next prime is 213231211051. The reversal of 213231211033 is 330112132312.

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-213231211033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213231210995 and 213231211013.

It is not an unprimeable number, because it can be changed into a prime (213231211093) 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, 638416633 + ... + 638416966.

It is an arithmetic number, because the mean of its divisors is an integer number (53627011200).

Almost surely, 2^213231211033 is an apocalyptic number.

It is an amenable number.

213231211033 is a deficient number, since it is larger than the sum of its proper divisors (1276833767).

213231211033 is a wasteful number, since it uses less digits than its factorization.

213231211033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276833766.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213231211033 its reverse (330112132312), we get a palindrome (543343343345).

The spelling of 213231211033 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred eleven thousand, thirty-three".